MESON Chess Problem Database

Problem Display
PID: 253060 (K6B/8/2QP3p/2PR2bR/4kp2/1bP2p2/2r2P2/1B1Nn3 w - - 0 1)

Lender, Baruch

Probleemblad, 1983

K6B/8/2QP3p/2PR2bR/4kp2/1bP2p2/2r2P2/1B1Nn3

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bh4
      • 2.Rd4#
      • 2.Rhe5#
    • 1...Bf6
      • 2.Rd4#
    • 1...Be7
      • 2.Rd4#
      • 2.Rhe5#
    • 1...Bd8
      • 2.Rd4#
      • 2.Rhe5#
    • 1...Sd3
      • 2.Re5#
  • Tries
    • 1.Se3?
      • threat
        • 2.Rd4#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...fxe3!
    • 1.Rd2+?
      • 1...Bd5
        • 2.Qxd5#
      • 1...Kf5!
    • 1.Rdxg5+?
      • 1...Bd5
        • 2.Qxd5#
      • 1...Kd3!
    • 1.Rhxg5?
      • threat
        • 2.Rd4#
        • 2.Rge5#
        • 2.Qe8#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...Ba4
        • 2.Rd4#
        • 2.Rge5#
        • 2.Qxa4#
      • 1...Sd3
        • 2.Rd4#
        • 2.Rde5#
      • 1...hxg5!
    • 1.Qe8+?
      • 1...Be7
        • 2.Rd4#
        • 2.Rhe5#
        • 2.Qg6#
        • 2.Qxe7#
      • 1...Kxd5!
    • 1.d7?
      • threat
        • 2.Qe6#
      • 1...Bf6
        • 2.Rd4#
      • 1...Sd3
        • 2.Re5#
      • 1...Bxd5!
  • Keys
    • 1.c4!
      • threat
        • 2.Sc3#
      • 1...Bf6
        • 2.Rd2#
      • 1...Sd3
        • 2.Rdxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(g);::QAB(H)+R(F),DCHECK
    • S(a);N_SPINR(b),SBLOCK::QAB(H)+R(F),DCHECK
  • Tries
    • Try
      • S(B);
      • Threat
        • QAB(H)+R(F),DCHECK
      • Vars
        • B(c);OGATE,P_PINQ(H),P_SPINB(c),XR(F)::QAB1(H),XB(c)
      • Refutation
        • P(f);XS(B)
    • Try
      • R(F);CHECK
      • Vars
        • B(c);N_GUARD,P_PINQ(H),P_SPINB(c)::QAB1(H),XB(c)
      • Refutation
        • K(e);P_SPINB(g),S_FLIGHT
    • Try
      • R(F);CHECK,XB(g)
      • Vars
        • B(c);N_GUARD,P_PINQ(H),P_SPINB(c)::QAB1(H),XB(c)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • R(G);XB(g)
      • Threat
        • DUALS(3)
      • Vars
        • B(c);OGATE,P_PINQ(H),P_SPINB(c),XR(F)::QAB1(H),XB(c)
      • Refutation
        • P(h);XR(G)
    • Try
      • Q(H);CHECK
      • Refutation
        • K(e);N_SPINR(b),P_SPINB(g),S_FLIGHT,XR(F)
    • Try
      • P(I);
      • Threat
        • QAR2(H)
      • Vars
        • B(g);::QAB(H)+R(F),DCHECK
        • S(a);N_SPINR(b),SBLOCK::QAB(H)+R(F),DCHECK
      • Refutation
        • B(c);P_PINQ(H),P_SPINB(c),XR(F)
  • Actual
    • P(D);
    • Threat
      • S(B)
    • Vars
      • B(g);::QAB(H)+R(F)
      • S(a);N_SPINR(b),SBLOCK::QAB(H)+R(F),XB(g)
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