MESON Chess Problem Database

Problem Display
PID: 18736 (b1Bb4/r2R1p1K/4N1p1/1RN1k1pQ/2Pp4/5p2/1B6/8 w - - 0 1)

Whyatt, William Albert

The Times Weekly Edition, 1957

b1Bb4/r2R1p1K/4N1p1/1RN1k1pQ/2Pp4/5p2/1B6/8

#2

9 + 9

5454 Near Snap 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Qxg5#
    • 1...f5
      • 2.Bxd4#
  • Tries
    • 1.Rd5+?
      • 1...Kf6
        • 2.Qxg5#
      • 1...Bxd5!
    • 1.Qg4?
      • threat
        • 2.Bxd4#
      • 1...Kf6
        • 2.Bxd4#
        • 2.Qxg5#
      • 1...Rxd7!
    • 1.Qxg5+?
      • 1...f5
        • 2.Bxd4#
      • 1...Bxg5!
  • Keys
    • 1.Rxd4!
      • threat
        • 2.Rd5#
      • 1...fxe6+
        • 2.Sd7#
      • 1...f5+
        • 2.Rd7#
      • 1...f6+
        • 2.Sb7#
      • 1...Kf5
        • 2.Rf4#
      • 1...Kf6
        • 2.Qxg5#
      • 1...Bd5
        • 2.Rxd5#

This anticipates 64087(1957)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::QAB1(E),XP(d)
    • P(g);P_PINR(G),SBLOCK::B(A),XP(b)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(E),XP(d)
      • Refutation
        • B(h);XR(G)
    • Try
      • Q(E);
      • Threat
        • B(A),XP(b)
      • Refutation
        • R(f);XR(G)
    • Try
      • Q(E);CHECK,XP(d)
      • Vars
        • P(g);P_PINR(G)::B(A),XP(b)
      • Refutation
        • B(i);XQ(E)
  • Actual
    • R(G);P_PINP(d),XP(b)
    • Threat
      • B(A)+R(G),DCHECK
    • Vars
      • P(g);CHECK,SBLOCK,XS(F)::R(C)+S(D),DCHECK
      • P(g);CHECK,N_SPINP(d),SBLOCK::B(A)+R(G)
      • P(g);CHECK,SBLOCK::R(C)+S(D)
      • K(c);P-FLIGHT::R1(G)
      • K(c);N_SPINP(d),S_FLIGHT::QAB1(E),XP(d)
      • B(h);::B(A)+R(G),DCHECK,XB(h)
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