The world's easiest test set "Easy-Peasy, Lemon-Squeezy"

[Dann Corbit]

There are 502 problems.
Each problem is a mate in 2.
Each problem has at least 202 correct answers.
Many problems are highly similar.
https://drive.google.com/file/d/1jiKTea ... sp=sharing

[Dann Corbit]

Each of these four has 216 correct responses:

Code: Select all

r4qRK/3q2NP/1q4qP/4q2n/2q4b/5q1b/1k1q4/r5q1 b - - bm Bd8 Be1 Be6 Be7 Bf1 Bf2 Bf5 Bf6 Bg2 Bg3 Bg4 Bg5 Ka2 Ka3 Kb1 Kb3 Kc1 Kc2 Kc3 Nf4 Nf6 Ng3 Nxg7 Q1b1 Q1g2 Q1g3 Q1g4 Q1g5 Q2d3 Q2d4 Q2d5 Q2d6 Q3a3 Q3f4 Q3f5 Q3f6 Q3f7 Q6b1 Q6g2 Q6g3 Q6g4 Q6g5 Q7d3 Q7d4 Q7d5 Q7d6 Q8a3 Q8f4 Q8f5 Q8f6 Q8f7 Qa2 Qba5 Qba6 Qba7 Qbb3 Qbb4 Qbb5 Qbb7 Qbb8 Qbc5 Qbc6 Qbc7 Qbd4 Qbd6 Qbd8 Qbe3 Qbe6 Qbf2 Qbf6 Qca4 Qca6 Qcb3 Qcb4 Qcb5 Qcc1 Qcc2 Qcc3 Qcc5 Qcc6 Qcc7 Qcc8 Qcd3 Qcd4 Qcd5 Qce2 Qce4 Qce6 Qcf1 Qcf4 Qcf7 Qcg4 Qcxg8+ Qda4 Qda5 Qda7 Qdb4 Qdb5 Qdb7 Qdc1 Qdc2 Qdc3 Qdc6 Qdc7 Qdc8 Qdd1 Qdd8 Qde1 Qde2 Qde3 Qde6 Qde7 Qde8 Qdf2 Qdf4 Qdf5 Qdf7 Qdg2 Qdg4 Qdg5 Qdh2 Qdxg7+ Qdxh6 Qea5 Qeb5 Qeb8 Qec3 Qec5 Qec7 Qed4 Qed5 Qed6 Qee1 Qee2 Qee3 Qee4 Qee6 Qee7 Qee8 Qef4 Qef5 Qef6 Qeg3 Qeg5 Qeh2 Qexg7+ Qfb3 Qfb4 Qfb7 Qfb8 Qfc3 Qfc5 Qfc6 Qfc8 Qfd1 Qfd3 Qfd5 Qfd6 Qfd8 Qfe2 Qfe3 Qfe4 Qfe7 Qfe8 Qff1 Qff2 Qfg2 Qfg3 Qfg4 Qfh1 Qfxg7+ Qfxg8+ Qgc1 Qgc2 Qgc5 Qgc6 Qgd1 Qgd3 Qgd4 Qgd6 Qge1 Qge3 Qge4 Qge6 Qge8 Qgf1 Qgf2 Qgf5 Qgf6 Qgf7 Qgh1 Qgh2 Qgxg7+ Qgxh6 Qxh7+ R1a2 R1a3 R1a4 R1a5 R1a6 R1a7 R8a2 R8a3 R8a4 R8a5 R8a6 R8a7 Rb1 Rb8 Rc1 Rc8 Rd1 Rd8 Re1 Re8 Rf1; ce 32764; 
KRq4r/PN2q3/Pq4q1/n2q4/b4q2/b1q5/4q1k1/1q5r b - - bm Bb2 Bb3 Bb4 Bb5 Bc1 Bc2 Bc5 Bc6 Bd1 Bd6 Bd7 Be8 Kf1 Kf2 Kf3 Kg1 Kg3 Kh2 Kh3 Nb3 Nc4 Nc6 Nxb7 Q1b2 Q1b3 Q1b4 Q1b5 Q1g1 Q2e3 Q2e4 Q2e5 Q2e6 Q3c4 Q3c5 Q3c6 Q3c7 Q3h3 Q6b2 Q6b3 Q6b4 Q6b5 Q6g1 Q7e3 Q7e4 Q7e5 Q7e6 Q8c4 Q8c5 Q8c6 Q8c7 Q8h3 Qba1 Qba2 Qbc1 Qbc2 Qbc5 Qbc6 Qbc7 Qbd1 Qbd3 Qbd4 Qbd6 Qbd8 Qbe1 Qbe3 Qbe4 Qbe6 Qbf1 Qbf2 Qbf5 Qbf6 Qbxa6 Qbxb7+ Qca1 Qcb2 Qcb3 Qcb4 Qcc1 Qcc2 Qcd2 Qcd3 Qcd4 Qcd7 Qcd8 Qce1 Qce3 Qce5 Qce6 Qce8 Qcf3 Qcf5 Qcf6 Qcf8 Qcg3 Qcg4 Qcg7 Qcg8 Qcxb7+ Qcxb8+ Qda2 Qdb3 Qdb5 Qdc4 Qdc5 Qdc6 Qdd1 Qdd2 Qdd3 Qdd4 Qdd6 Qdd7 Qdd8 Qde4 Qde5 Qde6 Qdf3 Qdf5 Qdf7 Qdg5 Qdg8 Qdh5 Qdxb7+ Qea2 Qeb2 Qeb4 Qeb5 Qec2 Qec4 Qec5 Qec7 Qed1 Qed2 Qed3 Qed6 Qed7 Qed8 Qee1 Qee8 Qef1 Qef2 Qef3 Qef6 Qef7 Qef8 Qeg4 Qeg5 Qeg7 Qeh4 Qeh5 Qeh7 Qexa6 Qexb7+ Qfb4 Qfc1 Qfc4 Qfc7 Qfd2 Qfd4 Qfd6 Qfe3 Qfe4 Qfe5 Qff1 Qff2 Qff3 Qff5 Qff6 Qff7 Qff8 Qfg3 Qfg4 Qfg5 Qfh4 Qfh6 Qfxb8+ Qgc2 Qgc6 Qgd3 Qgd6 Qge4 Qge6 Qge8 Qgf5 Qgf6 Qgf7 Qgg3 Qgg4 Qgg5 Qgg7 Qgg8 Qgh5 Qgh6 Qgh7 Qh2 Qxa7+ R1h2 R1h3 R1h4 R1h5 R1h6 R1h7 R8h2 R8h3 R8h4 R8h5 R8h6 R8h7 Rc1 Rd1 Rd8 Re1 Re8 Rf1 Rf8 Rg1 Rg8; ce 32764; 
1Q5R/4Q1K1/B1Q5/B4Q2/N2Q4/pQ4Q1/pn2Q3/krQ4R w - - bm Bb4 Bb5 Bb6 Bb7 Bc3 Bc4 Bc7 Bc8 Bd2 Bd3 Bd8 Be1 Kf6 Kf7 Kf8 Kg6 Kg8 Kh6 Kh7 Nb6 Nc3 Nc5 Nxb2 Q1c2 Q1c3 Q1c4 Q1c5 Q1h6 Q2e3 Q2e4 Q2e5 Q2e6 Q3b4 Q3b5 Q3b6 Q3b7 Q3g8 Q6c2 Q6c3 Q6c4 Q6c5 Q6h6 Q7e3 Q7e4 Q7e5 Q7e6 Q8b4 Q8b5 Q8b6 Q8b7 Q8g8 Qba7 Qba8 Qbc2 Qbc3 Qbc4 Qbc7 Qbc8 Qbd1 Qbd3 Qbd5 Qbd6 Qbd8 Qbe3 Qbe5 Qbe6 Qbe8 Qbf3 Qbf4 Qbf7 Qbf8 Qbxa3 Qbxb2+ Qca8 Qcb5 Qcb6 Qcb7 Qcc7 Qcc8 Qcd1 Qcd2 Qcd5 Qcd6 Qcd7 Qce1 Qce3 Qce4 Qce6 Qce8 Qcf1 Qcf3 Qcf4 Qcf6 Qcg1 Qcg2 Qcg5 Qcg6 Qcxb1+ Qcxb2+ Qda7 Qdb4 Qdb6 Qdc3 Qdc4 Qdc5 Qdd1 Qdd2 Qdd3 Qdd5 Qdd6 Qdd7 Qdd8 Qde3 Qde4 Qde5 Qdf2 Qdf4 Qdf6 Qdg1 Qdg4 Qdh4 Qdxb2+ Qea7 Qeb4 Qeb5 Qeb7 Qec2 Qec4 Qec5 Qec7 Qed1 Qed2 Qed3 Qed6 Qed7 Qed8 Qee1 Qee8 Qef1 Qef2 Qef3 Qef6 Qef7 Qef8 Qeg2 Qeg4 Qeg5 Qeh2 Qeh4 Qeh5 Qexa3 Qexb2+ Qfb5 Qfc2 Qfc5 Qfc8 Qfd3 Qfd5 Qfd7 Qfe4 Qfe5 Qfe6 Qff1 Qff2 Qff3 Qff4 Qff6 Qff7 Qff8 Qfg4 Qfg5 Qfg6 Qfh3 Qfh5 Qfxb1+ Qgc3 Qgc7 Qgd3 Qgd6 Qge1 Qge3 Qge5 Qgf2 Qgf3 Qgf4 Qgg1 Qgg2 Qgg4 Qgg5 Qgg6 Qgh2 Qgh3 Qgh4 Qh7 Qxa2+ R1h2 R1h3 R1h4 R1h5 R1h6 R1h7 R8h2 R8h3 R8h4 R8h5 R8h6 R8h7 Rc8 Rd1 Rd8 Re1 Re8 Rf1 Rf8 Rg1 Rg8; ce 32764; 
R5Q1/1K1Q4/5Q1B/2Q4B/4Q2N/1Q4Qp/3Q2np/R4Qrk w - - bm Bd1 Be2 Be3 Be8 Bf3 Bf4 Bf7 Bf8 Bg4 Bg5 Bg6 Bg7 Ka6 Ka7 Kb6 Kb8 Kc6 Kc7 Kc8 Nf3 Nf5 Ng6 Nxg2 Q1a6 Q1f2 Q1f3 Q1f4 Q1f5 Q2d3 Q2d4 Q2d5 Q2d6 Q3b8 Q3g4 Q3g5 Q3g6 Q3g7 Q6a6 Q6f2 Q6f3 Q6f4 Q6f5 Q7d3 Q7d4 Q7d5 Q7d6 Q8b8 Q8g4 Q8g5 Q8g6 Q8g7 Qa7 Qba2 Qba3 Qba4 Qbb1 Qbb2 Qbb4 Qbb5 Qbb6 Qbc2 Qbc3 Qbc4 Qbd1 Qbd3 Qbd5 Qbe3 Qbe6 Qbf3 Qbf7 Qca3 Qca5 Qcb4 Qcb5 Qcb6 Qcc1 Qcc2 Qcc3 Qcc4 Qcc6 Qcc7 Qcc8 Qcd4 Qcd5 Qcd6 Qce3 Qce5 Qce7 Qcf2 Qcf5 Qcf8 Qcg5 Qcxg1+ Qda2 Qda4 Qda5 Qdb2 Qdb4 Qdb5 Qdc1 Qdc2 Qdc3 Qdc6 Qdc7 Qdc8 Qdd1 Qdd8 Qde1 Qde2 Qde3 Qde6 Qde7 Qde8 Qdf2 Qdf4 Qdf5 Qdf7 Qdg4 Qdg5 Qdg7 Qdh7 Qdxg2+ Qdxh3 Qea4 Qeb1 Qeb4 Qec2 Qec4 Qec6 Qed3 Qed4 Qed5 Qee1 Qee2 Qee3 Qee5 Qee6 Qee7 Qee8 Qef3 Qef4 Qef5 Qeg4 Qeg6 Qeh7 Qexg2+ Qfb1 Qfb2 Qfb5 Qfb6 Qfc1 Qfc3 Qfc4 Qfc6 Qfd1 Qfd3 Qfd4 Qfd6 Qfd8 Qfe1 Qfe2 Qfe5 Qfe6 Qfe7 Qff7 Qff8 Qfg5 Qfg6 Qfg7 Qfh8 Qfxg1+ Qfxg2+ Qgc3 Qgc4 Qgc7 Qgc8 Qgd3 Qgd5 Qgd6 Qgd8 Qge1 Qge3 Qge5 Qge6 Qge8 Qgf2 Qgf3 Qgf4 Qgf7 Qgf8 Qgh7 Qgh8 Qgxg2+ Qgxh3 Qxh2+ R1a2 R1a3 R1a4 R1a5 R1a6 R1a7 R8a2 R8a3 R8a4 R8a5 R8a6 R8a7 Rb1 Rb8 Rc1 Rc8 Rd1 Rd8 Re1 Re8 Rf8; ce 32764; 

[Ajedrecista]

Hello Dann:

It reminds me some self-solving joke chess problems or no-brainers, where only one move can be made by the side to move (more than one in promotions, without changing the result), yet a checkmate is unavoidable. I found some of these problems in some numbers of Danish magazine Skakbladet:

[pgn][Event "Skakbladet Februar 1942, page 24, problem No. 5102"] [Site "Copenhagen (Denmark)"] [White "V. Røpge"] [Black "?"] [SetUp "1"] [FEN "K1k5/P1Pp4/1p1P4/8/p7/P2P4/8/8 w - - 0 1"] [PlyCount "11"] [Result "1-0"] 1. d4 b5 2. d5 b4 3. axb4 a3 4. b5 a2 5. b6 a1=Q (a1=R (a1=B (a1=N))) 6.b7# 1-0 [Event "Skakbladet Maj 1942, page 85"] [Site "?"] [White "A. Lundgren"] [Black "?"] [SetUp "1"] [FEN "KBk5/P1P1p3/2p1P3/1pP5/1Pp5/1PP5/8/8 w - - 0 1"] [PlyCount "13"] [Result "1-0"] 1. bxc4 bxc4 2. b5 cxb5 3. c6 b4 4. cxb4 c3 5. b5 c2 6. b6 c1=Q (c1=R (c1=B (c1=N))) 7.b7# 1-0 [Event "Skakbladet Juni 1942, page 101 (first problem of the page)"] [Site "Lyngby (Denmark)"] [White "K. Hannemann"] [Black "?"] [SetUp "1"] [FEN "KBk5/P1P5/p1P5/Pp5p/RP4B1/P7/6P1/8 b - - 0 1"] [PlyCount "14"] [Result "1-0"] 1.. hxg4 2. g3 bxa4 3. b5 axb5 4. a6 b4 5. axb4 a3 6. b5 a2 7. b6 a1=Q (a1=R (a1=B (a1=N))) 8. b7# 1-0[/pgn]

These positions are almost joke perft tests:

Code: Select all

https://skak.dk/images/skakbladet/1942/1942-02.pdf
Page 24, problem No. 5102:
K1k5/P1Pp4/1p1P4/8/p7/P2P4/8/8 w - - 0 1
perft(1)  perft(2)  perft(3)  perft(4)  perft(5)  perft(6)  perft(7)  perft(8)  perft(9)  perft(10)  perft(11)  perft(12)  perft(13)  perft(14)  perft(15)  perft(16)
   1         1         1         1         1         1         1         1         1          4          4          0          0          0          0          0
---------------------------------------------------------------------------------------------------------------------------------------------------------------------
https://skak.dk/images/skakbladet/1942/1942-05.pdf
Page 85:
KBk5/P1P1p3/2p1P3/1pP5/1Pp5/1PP5/8/8 w - - 0 1
perft(1)  perft(2)  perft(3)  perft(4)  perft(5)  perft(6)  perft(7)  perft(8)  perft(9)  perft(10)  perft(11)  perft(12)  perft(13)  perft(14)  perft(15)  perft(16)
   1         1         1         1         1         1         1         1         1          1          1          4          4          0          0          0
---------------------------------------------------------------------------------------------------------------------------------------------------------------------
https://skak.dk/images/skakbladet/1942/1942-06.pdf
Page 101 (first problem of the page):
KBk5/P1P5/p1P5/Pp5p/RP4B1/P7/6P1/8 b - - 0 1
perft(1)  perft(2)  perft(3)  perft(4)  perft(5)  perft(6)  perft(7)  perft(8)  perft(9)  perft(10)  perft(11)  perft(12)  perft(13)  perft(14)  perft(15)  perft(16)
   1         1         1         1         1         1         1         1         1          1          1          1          4          4          0          0

Regards from Spain.

Ajedrecista.

[Dann Corbit]

3 move mate version, between 102 and 92 winning moves:
https://drive.google.com/file/d/1v6CDPL ... sp=sharing
All done in fun, of course.