MESON Chess Problem Database

Problem Display
PID: 108333 (8/1R6/8/N2k4/8/B7/4K3/Q7 w - - 0 1)

Grishin, Aleksander A

Koster, 1979

8/1R6/8/N2k4/8/B7/4K3/Q7

#2

5 + 1

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sc4?
      • 1...Ke4
        • 2.Qe5#
      • 1...Kc6
        • 2.Qh1#
      • 1...Ke6
        • 2.Qe5#
      • 1...Kxc4!
    • 1.Bd6?
      • threat
        • 2.Qe5#
      • 1...Ke4
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...Kxd6!
    • 1.Rb5+?
      • 1...Ke4
        • 2.Qe5#
      • 1...Ke6!
  • Keys
    • 1.Sc6!
      • 1...Kc4
        • 2.Qd4#
      • 1...Ke4
        • 2.Qe5#
      • 1...Kxc6
        • 2.Qh1#
      • 1...Ke6
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • B(C);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT,XB(C)
    • Try
      • R(E);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(D);
    • Vars
      • K(a);S_FLIGHT::QAR1(A)
      • K(a);S_FLIGHT,XS(D)::QAB(A)
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