MESON Chess Problem Database

Problem Display
PID: 236220 (2r1B3/8/2PRpP2/4kPp1/1Pp5/2NPN2n/6P1/Q4KB1 w - - 0 1)

Bourd, Evgeny

Shtern, David

Variantim, 2017

2r1B3/8/2PRpP2/4kPp1/1Pp5/2NPN2n/6P1/Q4KB1

#2

13 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Se2#
    • 1...Kxd6
      • 2.Sb5#
    • 1...Kxf6
      • 2.Scd5#
  • Tries
    • 1.Se2+?
      • 1...c3
        • 2.Rxe6#
      • 1...Kxd6!
    • 1.Bh2+?
      • 1...Kxf6
        • 2.Scd5#
      • 1...Sf4!
    • 1.Rxe6+?
      • 1...Kf4
        • 2.Se2#
        • 2.Bh2#
      • 1...Kd4!
    • 1.Qa5+?
      • 1...Kf4
        • 2.Se2#
      • 1...Kxd6
        • 2.Se4#
        • 2.Sxc4#
      • 1...Kxf6!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Qd4#
      • 1...Kf4
        • 2.Bh2#
      • 1...Kxd6
        • 2.Sxc4#
      • 1...Kxf6
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::S(E)
    • K(c);S_FLIGHT,XR(K)::S(E)
    • K(c);P_SPINP(e),S_FLIGHT,XP(L)::QAB(A)+S(E),DCHECK
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • P(b);P_SPINP(b)::R1(K),XP(e)
      • Refutation
        • K(c);S_FLIGHT,XR(K)
    • Try
      • B(C);CHECK
      • Vars
        • K(c);P_SPINP(e),S_FLIGHT,XP(L)::QAB(A)+S(E),DCHECK
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • R(K);CHECK,XP(e)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT::S(E)
      • Refutation
        • K(c);P_SPINP(e),S_FLIGHT,XP(L)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(c);S_FLIGHT::B(C)
      • K(c);S_FLIGHT,XR(K)::S(G),XP(b)
      • K(c);P_SPINP(e),S_FLIGHT,XP(L)::R1(K),XP(e)
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