MESON Chess Problem Database

Problem Display
PID: 259446 (R5K1/2kp1N2/6R1/2P5/8/6r1/7B/7B w - - 0 1)

Cheylan, Yves

The Problemist, 1978

R5K1/2kp1N2/6R1/2P5/8/6r1/7B/7B

#2

7 + 3

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Sg5?
      • 1...d6
        • 2.Rg7#
      • 1...d5!
    • 1.Sd6?
      • threat
        • 2.Sb5#
        • 2.Se8#
        • 2.Rc8#
      • 1...Rg2
        • 2.Rc8#
      • 1...Rf3
        • 2.Rc8#
      • 1...Rxg6+!
    • 1.Sd8?
      • 1...d5
        • 2.Rg7#
      • 1...d6!
  • Keys
    • 1.Rg7!
      • 1...d5
        • 2.Sd8#
      • 1...d6
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);N_SPINR(D)
      • Vars
        • P(c);N_SPINR(a),OGATEB::R(D)
      • Refutation
        • P(c);
    • Try
      • S(E);N_PINR(a)
      • Threat
        • DUALS(3)
      • Vars
        • R(a);::R1(F)
        • R(a);N_PINR(D)::R1(F)
      • Refutation
        • R(a);CHECK,XR(D)
    • Try
      • S(E);
      • Vars
        • P(c);::R(D)
      • Refutation
        • P(c);N_SPINR(a)
  • Actual
    • R(D);
    • Vars
      • P(c);::R(D)+S(E)
      • P(c);N_SPINR(a)::R(D)+S(E)
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