MESON Chess Problem Database

Problem Display
PID: 44662 (5r2/2p5/8/2K1BRp1/1RB1kN2/5p2/1rq2P2/1Q6 w - - 0 1)

Ellerman, Arnoldo

Het Schaakleven, 1932

5r2/2p5/8/2K1BRp1/1RB1kN2/5p2/1rq2P2/1Q6

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb1
      • 2.Bd3#
    • 1...Qd3
      • 2.Bxd3#
      • 2.Qxd3#
    • 1...Rxb4
      • 2.Qxc2#
  • Tries
    • 1.Qe1+?
      • 1...Qe2
        • 2.Bd3#
      • 1...Kxf5!
  • Keys
    • 1.Bc3!
      • threat
        • 2.Bd3#
      • 1...Rxf5+
        • 2.Bd5#
      • 1...Kxf5
        • 2.Be6#
      • 1...Rxb4
        • 2.Qxc2#
      • 1...gxf4
        • 2.Re5#
      • 1...Qd3
        • 2.Bxd3#
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(b);N_PINB(D),N_SPINQ(b),XQ(A)::R(C)+B(D),DCHECK
    • R(a);N_GUARD,XR(C)::QAB(A),XQ(b)
  • Tries
    • Try
      • Q(A);CHECK,N_PINQ(b)
      • Vars
        • Q(b);N_PINB(D),P_SPINQ(b)::R(C)+B(D),DCHECK
      • Refutation
        • K(d);S_FLIGHT,XR(H)
  • Actual
    • B(G);N_SPINB(D)
    • Threat
      • R(C)+B(D),DCHECK
    • Vars
      • R(g);CHECK,SBLOCK,XR(H)::R(C)+B(D),DCHECK
      • K(d);S_FLIGHT,XR(H)::B(D)
      • R(a);N_GUARD,XR(C)::QAB(A),XQ(b)
      • P(e);SBLOCK,XS(E)::R1(H)
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