MESON Chess Problem Database

Problem Display
PID: 17432 (1K1Nr1bR/2PBkpR1/1Q1pP3/5n2/2N5/8/8/8 w - - 0 1)

Leites, Samuil Davidovich

1st Prize, Shakhmaty v SSSR, 1946

1K1Nr1bR/2PBkpR1/1Q1pP3/5n2/2N5/8/8/8

#2

9 + 6

14752 Soviet Chess Compositions (1945-1947) 1949
3147 Chess Problems: Introduction to an Art 1963
5862 An ABC of Chess Problems 1970
4640 Chess Wizardry: The New ABC of Chess Problems 1996
133 The Problemist Supplement 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Kf8
      • 2.Rxf7#
    • 1...Rxd8+
      • 2.cxd8Q#
    • 1...Bh7
      • 2.Rxf7#
  • Tries
    • 1.c8S+?
      • 1...Kf8
        • 2.Rxf7#
        • 2.Rgxg8#
        • 2.Rhxg8#
      • 1...Kf6!
  • Keys
    • 1.exf7!
      • 1...Rxd8+
        • 2.cxd8Q#
      • 1...Kf6
        • 2.fxe8S#
      • 1...Kxd7
        • 2.f8S#
      • 1...Kf8
        • 2.fxg8Q#
        • 2.fxg8R#
      • 1...Bxf7
        • 2.Rxf7#
      • 1...Sxg7
        • 2.Qxd6#
      • 1...Rf8
        • 2.fxg8S#
      • 1...Bh7
        • 2.f8Q#
      • 1...Se3
        • 2.Qxd6#
      • 1...Sg3
        • 2.Qxd6#
      • 1...Sd4
        • 2.Qxd6#
      • 1...Sh4
        • 2.Qxd6#
      • 1...Sh6
        • 2.Qxd6#
      • 1...d5
        • 2.fxe8Q#
        • 2.fxe8R#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 10
    • REMOVED MATES = 1
  • Sets
    • K(c);N_SPINP(d),P_SPINB(f),S_FLIGHT::R1(F),XP(d)
    • R(e);CHECK,OGATE,XS(H)::PXR(e)=Q
    • B(f);N_GUARD::R1(F),XP(d)
  • Tries
    • Try
      • P(D);CHECK,N_SPINS(H)
      • Refutation
        • K(c);N_SPINP(d),S_FLIGHT
  • Actual
    • P(C);XP(d)
    • Vars
      • R(e);CHECK,OGATE,XS(H)::PXR(e)=Q
      • K(c);P_SPINP(b),S_FLIGHT::PXR(e)=S
      • K(c);P-FLIGHT,XB(E)::P=S
      • K(c);P_SPINB(f),S_FLIGHT::PXB(f)=Q
      • B(f);OGATE,P_SPINB(f),XP(C)::R1(F),XB(f)
      • S(a);N_GUARD,XR(F)::QAB1(B),XP(b)
      • R(e);SBLOCK::PXB(f)=S
      • B(f);::P=Q
      • S(a);N_GUARD::QAB1(B),XP(b)
      • P(b);::PXR(e)=Q
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