MESON Chess Problem Database

Problem Display
PID: 181291 (K7/8/8/krRN4/8/8/N7/3Q4 w - - 0 1)

Fomichev, Evgeny Vasilevich

Problemskak, 2018

K7/8/8/krRN4/8/8/N7/3Q4

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Rxb5+?
      • 1...Ka6
        • 2.Sc7#
        • 2.Qa4#
      • 1...Kxb5!
    • 1.Qb3?
      • threat
        • 2.Qa3#
        • 2.Qxb5#
      • 1...Ka6
        • 2.Qxb5#
      • 1...Rxc5!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Sc1#
        • 2.Sac3#
        • 2.Sab4#
      • 1...Ka4
        • 2.Sc1#
      • 1...Ka6
        • 2.Sab4#
      • 1...Rxc5
        • 2.Sac3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);CHECK,XR(b)
      • Refutation
        • K(a);P-FLIGHT,XR(C)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);N_SPINR(b),P-FLIGHT::QAB1(A),XR(b)
      • Refutation
        • R(b);N_SPINR(b),XR(C)
  • Actual
    • Q(A);
    • Threat
      • DUALS(3)
    • Vars
      • K(a);N_SPINR(b),P-FLIGHT::QAR(A)+S(B)
      • K(a);N_SPINR(b),P-FLIGHT::QAR(A)+S(B),DCHECK
      • R(b);N_SPINR(b),XR(C)::QAR(A)+S(B)
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