MESON Chess Problem Database

Problem Display
PID: 108165 (8/b3N3/N7/p2B4/p2k1p2/3p4/1R6/4Q1K1 w - - 0 1)

Goldstein, Alexander

Chess Life & Review, 1985

8/b3N3/N7/p2B4/p2k1p2/3p4/1R6/4Q1K1

#2

6 + 6

6490 yacpdb 2009
5454 Near Snap 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Rc2?
      • threat
        • 2.Rc4#
        • 2.Qe4#
      • 1...d2
        • 2.Qe4#
      • 1...dxc2!
    • 1.Re2?
      • threat
        • 2.Re4#
        • 2.Qa1#
      • 1...d2
        • 2.Qxd2#
      • 1...dxe2!
    • 1.Qc3+?
      • 1...Ke3
        • 2.Sf5#
        • 2.Qe5#
      • 1...Kxc3+!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Re2#
      • 1...Kc3+
        • 2.Rf2#
      • 1...Ke5+
        • 2.Rb6#
      • 1...Ke3
        • 2.Sf5#
      • 1...d2
        • 2.Rb3#

Anticipated by 109671(1892)

This anticipates 204965(2014)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::QAR1(A)
      • Refutation
        • P(a);XR(C)
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);OGATEB::QAR2(A),XP(a)
      • Refutation
        • P(a);XR(C)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(c);CHECK,S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+R(C)
    • Vars
      • K(c);CHECK,S_FLIGHT::QAB(A)+R(C)
      • K(c);S_FLIGHT::S(F)
      • P(a);::QAB(A)+R(C)
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