MESON Chess Problem Database

Problem Display
PID: 39123 (1RKNk2r/rQ6/2P1P2P/6B1/8/3B4/8/6R1 w k - 0 1)

Shanshin, Valery Yurevich

The Problemist, 2001

1RKNk2r/rQ6/2P1P2P/6B1/8/3B4/8/6R1

#2

10 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qe7#
      • 2.Qf7#
    • 1...Ra2
      • 2.Qe7#
      • 2.Qf7#
    • 1...Ra3
      • 2.Qe7#
      • 2.Qf7#
    • 1...Ra4
      • 2.Qe7#
      • 2.Qf7#
    • 1...Ra5
      • 2.Qe7#
      • 2.Qf7#
    • 1...Ra6
      • 2.Qe7#
      • 2.Qf7#
    • 1...Ra8
      • 2.Qe7#
      • 2.Qf7#
    • 1...0-0
      • 2.Bf6#
  • Tries
    • 1.Kc7?
      • threat
        • 2.Sf7#
      • 1...Rxb7+
        • 2.Sxb7#
      • 1...Kf8
        • 2.Sf7#
      • 1...0-0
        • 2.Bf6#
      • 1...Ra8!
    • 1.Qxa7?
      • threat
        • 2.Qe7#
        • 2.Qf7#
      • 1...Kf8
        • 2.Qf7#
      • 1...0-0
        • 2.Bf6#
        • 2.Qg7#
        • 2.Qh7#
      • 1...Rf8
        • 2.Qd7#
        • 2.Qe7#
      • 1...Rh7!
    • 1.Qd7+?
      • 1...Kf8
        • 2.Be7#
      • 1...Rxd7!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Kc7#
      • 1...0-0+
        • 2.Bd8#
      • 1...Kf8
        • 2.Kc7#
        • 2.Kd7#
      • 1...Rxb7
        • 2.Kxb7#
      • 1...Ra8
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);0-0,OGATEB,P_PINS(J)::R(A)+B(C)
  • Tries
    • Try
      • K(I);P-FLIGHT,P_SPINQ(G)
      • Threat
        • R(H)+S(J)
      • Vars
        • R(a);CHECK,XQ(G)::R(H)+S(J),XR(a)
        • K(b);P-FLIGHT::R(H)+S(J)
        • K(b);0-0,OGATEB::R(A)+B(C)
      • Refutation
        • R(a);N_PINQ(G)
    • Try
      • Q(G);XR(a)
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::QAR1(G)
      • Refutation
        • R(c);
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);P-FLIGHT::B(C)
      • Refutation
        • R(a);XQ(G)
  • Actual
    • S(J);
    • Threat
      • R(H)+K(I)
    • Vars
      • K(b);0-0,CHECK,OGATEB::R(A)+B(C)
      • R(a);XQ(G)::R(H)+K(I),XR(a)
      • R(a);N_GUARD,P_PINR(H)::QAR1(G)
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