MESON Chess Problem Database

Problem Display
PID: 133221 (8/1Q6/8/1pRBR3/1pPrP3/3k4/3P4/3K4 w - - 0 1)

Hermanson, Halvar

The Field, 1960

(First published on Thu Aug 4 1960)

8/1Q6/8/1pRBR3/1pPrP3/3k4/3P4/3K4

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5
      • 2.Qxd5#
  • Tries
    • 1.Qxb5?
      • 1...Rxc4
        • 2.Qxc4#
      • 1...Rxd5
        • 2.Rcxd5#
      • 1...b3
        • 2.Qxb3#
      • 1...Rxe4!
    • 1.Qh7?
      • threat
        • 2.Qh3#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Rxd5
        • 2.Rexd5#
      • 1...Rxc4!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qh3#
      • 1...Rxc4
        • 2.Bxc4#
      • 1...Rxe4
        • 2.Bxe4#
      • 1...Rxd5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(c);OGATE,XB(F)::QAR2(H),XR(c)
  • Tries
    • Try
      • Q(H);XP(d)
      • Vars
        • R(c);OGATE,P_SPINR(c),XP(C)::QAB1(H),XR(c)
        • R(c);OGATE,XB(F)::R(E),XR(c)
        • P(b);OGATE::QAR2(H),XP(b)
      • Refutation
        • R(c);XP(D)
    • Try
      • Q(H);
      • Threat
        • QAR(H)
      • Vars
        • R(c);OGATE,P_SPINR(c),XP(D)::QAB1(H),XR(c)
        • R(c);OGATE,XB(F)::R(G),XR(c)
      • Refutation
        • R(c);XP(C)
  • Actual
    • Q(H);
    • Threat
      • QAR(H)
    • Vars
      • R(c);OGATE,XP(C)::QAR(H)+B(F),DCHECK,XR(c)
      • R(c);OGATE,XP(D)::QAR(H)+B(F),DCHECK,XR(c)
      • R(c);OGATE,P_SPINR(c),XB(F)::QAR2(H),XR(c)
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