MESON Chess Problem Database

Problem Display
PID: 18674 (8/p1K5/krP2Q2/NRR5/8/8/8/8 w - - 0 1)

Goldschmeding, Cornelis

Problem (Zagreb), 1957

8/p1K5/krP2Q2/NRR5/8/8/8/8

#2

6 + 3

5862 An ABC of Chess Problems 1970
4640 Chess Wizardry: The New ABC of Chess Problems 1996
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc6+
      • 2.Qxc6#
    • 1...Rb7+
      • 2.cxb7#
  • Tries
    • 1.Sb3?
      • threat
        • 2.Ra5#
        • 2.Qa1#
      • 1...Rxc6+
        • 2.Qxc6#
      • 1...Rb7+
        • 2.cxb7#
      • 1...Rxb5!
    • 1.Sc4?
      • threat
        • 2.Ra5#
        • 2.Qa1#
      • 1...Rxc6+
        • 2.Qxc6#
      • 1...Rb7+
        • 2.cxb7#
      • 1...Rxb5!
    • 1.Sb7?
      • threat
        • 2.Ra5#
        • 2.Qa1#
      • 1...Rxc6+
        • 2.Qxc6#
      • 1...Rxb7+
        • 2.cxb7#
      • 1...Rxb5!
    • 1.Qa1?
      • threat
        • 2.Sb3#
        • 2.Sc4#
        • 2.Sb7#
      • 1...Rxc6+
        • 2.Sxc6#
      • 1...Rb7+
        • 2.Sxb7#
      • 1...Rxb5!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Rxb6#
      • 1...Rxc6+
        • 2.Rxc6#
      • 1...Rb7+
        • 2.Rxb7#
      • 1...Rxb5
        • 2.Qxb5#
      • 1...Rb8
        • 2.Rb6#
        • 2.Rb7#
        • 2.Rxb8#

This is a version of 96416

Version by Comins Mansfield

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(b);CHECK,OGATE,P_SPINR(b),XP(D)::QAR2(E),XR(b)
    • R(b);CHECK,OGATE::QAR(E)+P(D),XR(b)
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);CHECK,OGATE,P_SPINR(b),XP(D)::QAR2(E),XR(b)
        • R(b);CHECK,OGATE::QAR(E)+P(D),XR(b)
      • Refutation
        • R(b);XR(B)
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);CHECK,OGATE,P_SPINR(b),XP(D)::QAR2(E),XR(b)
        • R(b);CHECK,OGATE::QAR(E)+P(D),XR(b)
      • Refutation
        • R(b);XR(B)
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);CHECK,OGATE,P_SPINR(b),XP(D)::QAR2(E),XR(b)
        • R(b);CHECK,OGATE,XS(A)::QAR(E)+P(D),XR(b)
      • Refutation
        • R(b);XR(B)
    • Try
      • Q(E);
      • Threat
        • DUALS(3)
      • Vars
        • R(b);CHECK,XP(D)::QAR(E)+S(A),XR(b)
        • R(b);CHECK::QAR(E)+S(A),XR(b)
      • Refutation
        • R(b);XR(B)
  • Actual
    • Q(E);
    • Threat
      • QAB(E)+R(B),DCHECK,XR(b)
    • Vars
      • R(b);CHECK,OGATE,XP(D)::R(C),XR(b)
      • R(b);CHECK,OGATE::QAB(E)+R(B),XR(b)
      • R(b);OGATE,P_SPINR(b),XR(B)::QAB1(E),XR(b)
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