MESON Chess Problem Database

Problem Display
PID: 110125 (3r1nB1/2n1RN1b/8/qpPkbp2/1p3P2/p2K1RP1/4PB2/7Q w - - 0 1)

Kubbel, Leonid Ivanovich (AKA Kubbel, Karl Artur Leonid)

Leningrad, 1937

3r1nB1/2n1RN1b/8/qpPkbp2/1p3P2/p2K1RP1/4PB2/7Q

#2

11 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6+
      • 2.Sxd8#
    • 1...Bxf4
      • 2.Rxf4#
  • Tries
    • 1.Bg1?
      • threat
        • 2.Rf1#
      • 1...Kc6+
        • 2.Sxd8#
      • 1...Bd4!
    • 1.Be3?
      • threat
        • 2.Rf1#
        • 2.Rf2#
      • 1...Kc6+
        • 2.Sxd8#
      • 1...Bd4!
    • 1.Bd4?
      • threat
        • 2.Rf1#
        • 2.Rf2#
        • 2.Re3#
      • 1...Kc6
        • 2.Sxd8#
      • 1...Bxd4!
    • 1.e4+?
      • 1...Kc6+
        • 2.Sxd8#
      • 1...fxe4+!
    • 1.fxe5?
      • threat
        • 2.Rf4#
        • 2.Rxf5#
      • 1...Kc6+
        • 2.Sxd8#
      • 1...f4+!
  • Keys
    • 1.Kd2!
      • threat
        • 2.Rc3#
      • 1...Kc4+
        • 2.Sd6#
      • 1...Ke4+
        • 2.Rd3#
      • 1...Kc6+
        • 2.Sxd8#
      • 1...Bc3+
        • 2.Rxc3#
      • 1...Bxf4+
        • 2.Rxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(e);CHECK,S_FLIGHT::S(J),XR(j)
    • B(f);OGATE,XP(G)::QAB(A)+R(E),XB(f)
  • Tries
    • Try
      • B(C);
      • Threat
        • QAB(A)+R(E)
      • Vars
        • K(e);CHECK,S_FLIGHT::S(J),XR(j)
      • Refutation
        • B(f);
    • Try
      • B(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(e);CHECK,S_FLIGHT::S(J),XR(j)
      • Refutation
        • B(f);
    • Try
      • B(C);
      • Threat
        • DUALS(3)
      • Vars
        • K(e);P_PINB(C),S_FLIGHT::S(J),XR(j)
      • Refutation
        • B(f);XB(C)
    • Try
      • P(B);CHECK
      • Vars
        • K(e);CHECK,S_FLIGHT::S(J),XR(j)
      • Refutation
        • P(g);CHECK,XP(B)
    • Try
      • P(G);XB(f)
      • Threat
        • DUALS(2)
      • Vars
        • K(e);CHECK,S_FLIGHT::S(J),XR(j)
      • Refutation
        • P(g);CHECK
  • Actual
    • K(D);P-FLIGHT
    • Threat
      • QAB(A)+R(E)
    • Vars
      • K(e);CHECK,S_FLIGHT::B(K)+S(J),DCHECK
      • K(e);CHECK,P_SPINB(f),S_FLIGHT::QAB(A)+R(E)
      • K(e);CHECK,S_FLIGHT::S(J),XR(j)
      • B(f);CHECK::QAB(A)+R(E),XB(f)
      • B(f);CHECK,OGATE,XP(G)::QAB(A)+R(E),XB(f)
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