MESON Chess Problem Database

Problem Display
PID: 256441 (2b5/p3p3/R1qkP2R/Q5p1/2p1p1r1/2K1N1r1/3P3B/6b1 w - - 0 1)

Byas, Walter

British Chess Magazine, 1933

2b5/p3p3/R1qkP2R/Q5p1/2p1p1r1/2K1N1r1/3P3B/6b1

#2

8 + 11

SOLUTION

  • SOUND
  • Tries
    • 1.Kd4?
      • threat
        • 2.Qe5#
      • 1...Qb6+
        • 2.Qc5#
      • 1...Qxa6
        • 2.Qc5#
      • 1...Bxe6
        • 2.Qd8#
      • 1...Bxe3+!
    • 1.Bxg3+?
      • 1...Rf4
        • 2.Sxc4#
        • 2.Sf5#
      • 1...Rxg3!
    • 1.Qc7+?
      • 1...Kc5
        • 2.Ra5#
        • 2.Qxc6#
      • 1...Kxc7!
  • Keys
    • 1.d4!
      • threat
        • 2.Qe5#
      • 1...cxd4 ep+
        • 2.Sc4#
      • 1...Qxa6
        • 2.Qc5#
      • 1...Bxe6
        • 2.Qd8#
      • 1...exd4 ep
        • 2.Sf5#
      • 1...Qb6
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • QAB1(E)
      • Vars
        • Q(g);CHECK::QAB1(E)
        • Q(g);N_SPINQ(g),XR(F)::QAB1(E)
        • B(k);N_GUARD,P_SPINB(k),XP(G)::QAR2(E)
      • Refutation
        • B(a);CHECK,XS(D)
    • Try
      • B(B);CHECK,N_SPINS(D),XR(b)
      • Refutation
        • R(e);P_PINS(D),XB(B)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(h);N_SPINQ(g),S_FLIGHT,XQ(E)
  • Actual
    • P(A);
    • Threat
      • QAB1(E)
    • Vars
      • P(c);CHECK,EP,N_PINS(D),XP(A)::S(D)
      • Q(g);N_SPINQ(g),XR(F)::QAB1(E)
      • B(k);N_GUARD,P_SPINB(k),XP(G)::QAR2(E)
      • P(d);EP,N_PINS(D),XP(A)::S(D)
      • Q(g);::QAB1(E)
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