MESON Chess Problem Database

Problem Display
PID: 273022 (2N1nkr1/K2Rb1rP/1N2P2Q/2P5/8/B4B2/8/5R2 w - - 0 1)

Leites, Samuil Davidovich

The Problemist, 1931

2N1nkr1/K2Rb1rP/1N2P2Q/2P5/8/B4B2/8/5R2

#2

11 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Bh4
      • 2.Rf7#
    • 1...Bxc5
      • 2.Rf7#
    • 1...Bg5
      • 2.Rf7#
    • 1...Bd6
      • 2.Rf7#
    • 1...Bf6
      • 2.Rf7#
    • 1...Bd8
      • 2.Rf7#
  • Tries
    • 1.Sxe7?
      • threat
        • 2.Sg6#
        • 2.hxg8Q#
        • 2.hxg8R#
      • 1...Sd6
        • 2.hxg8Q#
        • 2.hxg8R#
      • 1...Sc7
        • 2.Bh5#
        • 2.hxg8Q#
        • 2.hxg8R#
      • 1...Rh8
        • 2.Sg6#
      • 1...Sf6!
    • 1.Bd1+?
      • 1...Bf6
        • 2.Rf7#
      • 1...Sf6!
    • 1.Bh1+?
      • 1...Bf6
        • 2.Rf7#
      • 1...Sf6!
    • 1.Be2+?
      • 1...Bf6
        • 2.Rf7#
      • 1...Sf6!
    • 1.Bg2+?
      • 1...Bf6
        • 2.Rf7#
      • 1...Sf6!
    • 1.Be4+?
      • 1...Bf6
        • 2.Rf7#
      • 1...Sf6!
    • 1.Bg4+?
      • 1...Bf6
        • 2.Rf7#
      • 1...Sf6!
    • 1.Bd5+?
      • 1...Bf6
        • 2.Rf7#
        • 2.e7#
      • 1...Sf6!
    • 1.Bh5+?
      • 1...Bf6
        • 2.Rf7#
        • 2.e7#
      • 1...Sf6!
    • 1.Bc6+?
      • 1...Bf6
        • 2.Rf7#
      • 1...Sf6!
    • 1.Bb7+?
      • 1...Bf6
        • 2.Rf7#
      • 1...Sf6!
    • 1.Ba8+?
      • 1...Bf6
        • 2.Rf7#
      • 1...Sf6!
    • 1.Rxe7?
      • threat
        • 2.Sd7#
        • 2.Rf7#
      • 1...Sd6
        • 2.Sd7#
      • 1...Sc7
        • 2.Sd7#
        • 2.Bd1#
        • 2.Bh1#
        • 2.Be2#
        • 2.Bg2#
        • 2.Be4#
        • 2.Bg4#
        • 2.Bd5#
        • 2.Bh5#
        • 2.Bc6#
        • 2.Bb7#
        • 2.Ba8#
      • 1...Sf6!
  • Keys
    • 1.Rd8!
      • threat
        • 2.Sd7#
      • 1...Bxc5+
        • 2.Bb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • B(a);OGATE,P_PINR(I)::R1(I)
    • B(a);OGATE,P_PINR(I),P_PINS(E),P_SPINB(a),XP(D)::R1(I)
  • Tries
    • Try
      • S(K);XB(a)
      • Threat
        • DUALS(3)
      • Vars
        • S(c);::PXR(e)=Q
        • R(e);::S(K)
      • Refutation
        • S(c);
    • Try
      • B(C);CHECK
      • Vars
        • B(a);OGATE,P_PINR(I),P_SPINB(a)::R1(I)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • B(C);CHECK
      • Vars
        • B(a);OGATE,P_PINR(I),P_SPINB(a)::R1(I)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • B(C);CHECK
      • Vars
        • B(a);OGATE,P_PINR(I),P_SPINB(a)::R1(I)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • B(C);CHECK
      • Vars
        • B(a);OGATE,P_PINR(I),P_SPINB(a)::R1(I)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • B(C);CHECK
      • Vars
        • B(a);OGATE,P_PINR(I),P_SPINB(a)::R1(I)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • B(C);CHECK
      • Vars
        • B(a);OGATE,P_PINR(I),P_SPINB(a)::R1(I)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • B(C);CHECK
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • B(C);CHECK
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • B(C);CHECK
      • Vars
        • B(a);OGATE,P_PINR(I),P_SPINB(a)::R1(I)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • B(C);CHECK
      • Vars
        • B(a);OGATE,P_SPINB(a)::R1(I)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • B(C);CHECK
      • Vars
        • B(a);OGATE,P_PINR(I),P_SPINB(a)::R1(I)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • R(I);P_SPINR(I),XB(a)
      • Threat
        • DUALS(2)
      • Vars
        • S(c);::S(E)
      • Refutation
        • S(c);
  • Actual
    • R(I);P_PINS(c)
    • Threat
      • S(E)
    • Vars
      • B(a);CHECK,N_GUARD,P_PINS(E),P_SPINB(a),XP(D)::R(A)+B(C)
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