MESON Chess Problem Database
Problem Display
PID: 55161 (3Q4/N1nbn3/3k2P1/3Pp2R/1P6/1K1R1P2/4N3/2B5 w - - 0 1)
Pechenkin, Petr Stepanovich
2nd Prize, Na Smenu!, 1962
#2
11 + 5
| 3747 | FIDE Album (1962-1964) | 1968 |
| 5454 | Near Snap | 2009 |
| 56 | The Problemist | 2012 |
| 133 | The Problemist Supplement | 2015 |
SOLUTION
- SOUND
- Sets
- 1...Sb5
- 2.Sxb5#
- 1...Sa6
- 2.Sb5#
- 1...Se6
- 2.Sb5#
- 1...Sa8
- 2.Sb5#
- 1...Se8
- 2.Sb5#
- 1...Sf5
- 2.Sc8#
- 1...Sc6
- 2.Sc8#
- 1...Sxg6
- 2.Sc8#
- 1...Sc8
- 2.Sxc8#
- 1...Sg8
- 2.Sc8#
- 1...e4
- 2.Bf4#
- 1...Sb5
- Tries
- 1.Sf4?
- 1...Scxd5
- 2.Qb8#
- 1...Sexd5
- 2.Qf8#
- 1...Sxg6
- 2.Sc8#
- 1...exf4
- 2.Bxf4#
- 1...Sb5
- 2.Sxb5#
- 1...Sa6
- 2.Sb5#
- 1...Se6
- 2.Sb5#
- 1...Sa8
- 2.Sb5#
- 1...Se8
- 2.Sb5#
- 1...Sf5
- 2.Sc8#
- 1...Sc6
- 2.Sc8#
- 1...Sc8
- 2.Sxc8#
- 1...Sg8
- 2.Sc8#
- 1...e4!
- 1...Scxd5
- 1.Bg5?
- threat
- 2.Bxe7#
- 2.Qxe7#
- 1...Sexd5
- 2.Qe7#
- 1...Sxg6
- 2.Sc8#
- 1...Sb5
- 2.Sxb5#
- 2.Bxe7#
- 1...Sa6
- 2.Sb5#
- 2.Bxe7#
- 1...Se6
- 2.Sb5#
- 2.Bxe7#
- 1...Sa8
- 2.Sb5#
- 2.Bxe7#
- 1...Se8
- 2.Sb5#
- 2.Bxe7#
- 1...Sf5
- 2.Sc8#
- 1...Sc6
- 2.Sc8#
- 1...Sc8
- 2.Sxc8#
- 1...Sg8
- 2.Sc8#
- 1...Scxd5!
- threat
- 1.Rf5?
- 1...Scxd5
- 2.Rf6#
- 1...Sxf5
- 2.Sc8#
- 1...Sxg6
- 2.Sc8#
- 1...Sb5
- 2.Sxb5#
- 2.Rf6#
- 1...Sa6
- 2.Sb5#
- 2.Rf6#
- 1...Se6
- 2.Sb5#
- 1...Sa8
- 2.Sb5#
- 2.Rf6#
- 1...Se8
- 2.Sb5#
- 1...Sc6
- 2.Sc8#
- 1...Sc8
- 2.Sxc8#
- 1...Sg8
- 2.Sc8#
- 1...e4
- 2.Bf4#
- 1...Sexd5!
- 1...Scxd5
- 1.Rh7?
- threat
- 2.Qxe7#
- 1...Sexd5
- 2.Qe7#
- 2.Qxd7#
- 1...Sxg6
- 2.Sc8#
- 2.Rxd7#
- 2.Qxd7#
- 1...Sb5
- 2.Sxb5#
- 1...Sa6
- 2.Sb5#
- 1...Se6
- 2.Sb5#
- 1...Sa8
- 2.Sb5#
- 1...Se8
- 2.Sb5#
- 1...Sf5
- 2.Sc8#
- 2.Rxd7#
- 2.Qxd7#
- 1...Sc6
- 2.Sc8#
- 2.Rxd7#
- 2.Qxd7#
- 1...Sc8
- 2.Sxc8#
- 2.Rxd7#
- 2.Qxd7#
- 1...Sg8
- 2.Sc8#
- 2.Rxd7#
- 2.Qxd7#
- 1...Scxd5!
- threat
- 1.Sf4?
- Keys
- 1.Sd4!
- 1...Kxd5
- 2.Qxd7#
- 1...Scxd5
- 2.Sab5#
- 1...Sexd5
- 2.Sc8#
- 1...Sxg6
- 2.Sf5#
- 1...exd4
- 2.Bf4#
- 1...Sb5
- 2.Sdxb5#
- 1...Sa6
- 2.Sdb5#
- 1...Se6
- 2.Sdb5#
- 1...Sa8
- 2.Sdb5#
- 1...Se8
- 2.Sdb5#
- 1...Sf5
- 2.Sxf5#
- 1...Sc6
- 2.Sf5#
- 1...Sc8
- 2.Sf5#
- 1...Sg8
- 2.Sf5#
- 1...e4
- 2.Bf4#
- 1...Kxd5
- 1.Sd4!
This anticipates 103740(1984)
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 5
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- S(c);N_GUARD::S(J),XS(c)
- S(c);N_GUARD::S(J)
- S(e);N_GUARD::S(J)
- S(e);N_GUARD,XP(I)::S(J)
- S(e);N_GUARD::S(J),XS(e)
- P(a);OGATEB::B(A)
- Tries
- Try
- S(B);
- Vars
- S(c);OGATEB,P_SPINS(c),XP(G)::QAB(K)
- S(e);OGATEB,P_SPINS(e),XP(G)::QAB(K)
- S(e);N_GUARD,XP(I)::S(J)
- P(a);OGATE,XS(B)::B(A),XP(a)
- S(c);N_GUARD::S(J),XS(c)
- S(c);N_GUARD::S(J)
- S(e);N_GUARD::S(J)
- S(e);N_GUARD::S(J),XS(e)
- Refutation
- P(a);
- Try
- B(A);
- Threat
- DUALS(2)
- Vars
- S(e);P_SPINS(e),XP(G)::QAB1(K)
- S(e);N_GUARD,XP(I)::S(J)
- S(e);N_GUARD::S(J)
- S(e);N_GUARD::S(J),XS(e)
- Refutation
- S(c);P_SPINS(c),XP(G)
- Try
- R(H);
- Vars
- S(c);N_GUARD,P_SPINS(c),XP(G)::R(H)
- S(e);N_GUARD,XR(H)::S(J)
- S(e);N_GUARD,XP(I)::S(J)
- S(c);N_GUARD::S(J)
- S(e);N_GUARD::S(J)
- S(e);N_GUARD::S(J),XS(e)
- P(a);OGATEB::B(A)
- Refutation
- S(e);P_SPINS(e),XP(G)
- Try
- R(H);
- Threat
- QAB1(K),XS(e)
- Vars
- S(c);N_GUARD::S(J),XS(c)
- S(c);N_GUARD::S(J)
- Refutation
- S(c);P_SPINS(c),XP(G)
- Try
- Actual
- S(B);
- Vars
- K(b);P-FLIGHT,P_SPINP(a),XP(G)::QAR2(K),XB(d)
- S(c);N_GUARD,SBLOCK,XP(G)::S(J)
- S(e);N_GUARD,SBLOCK,XP(G)::S(J)
- S(e);N_GUARD,XP(I)::S(B)
- P(a);OGATEB,XS(B)::B(A)
- S(c);N_GUARD::S(B),XS(c)
- S(c);N_GUARD::S(B)
- S(e);N_GUARD::S(B),XS(e)
- S(e);N_GUARD::S(B)
- P(a);OGATEB::B(A)
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