MESON Chess Problem Database

Problem Display
PID: 235692 (8/8/8/2PPkPP1/p3Bb2/2K3B1/Q1PrR3/8 w - - 0 1)

Makaronets, Leonid

Mat, 1972

8/8/8/2PPkPP1/p3Bb2/2K3B1/Q1PrR3/8

#2

10 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Bd3#
    • 1...Rxc2+
      • 2.Bxc2#
    • 1...Rd3+
      • 2.Bxd3#
    • 1...Rxd5
      • 2.Bd3#
      • 2.Qxd5#
  • Tries
    • 1.d6?
      • threat
        • 2.Qe6#
      • 1...Rxc2+
        • 2.Bxc2#
      • 1...Rd3+
        • 2.Bxd3#
      • 1...Rxd6
        • 2.Bd3#
      • 1...Rd5
        • 2.Bd3#
        • 2.Qxd5#
      • 1...Bxg3!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qb8#
      • 1...Rxc2+
        • 2.Kxc2#
      • 1...Rd3+
        • 2.Kxd3#
      • 1...Rxe2
        • 2.Kd3#
      • 1...Rxd5
        • 2.Bd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(a);N_GUARD::R(C)+B(F)
    • R(a);CHECK,OGATE,XP(B)::R(C)+B(F),XR(a)
    • R(a);CHECK,N_GUARD::R(C)+B(F),XR(a)
  • Tries
    • Try
      • P(H);
      • Threat
        • QAR1(A)
      • Vars
        • R(a);CHECK,OGATE,XP(B)::R(C)+B(F),XR(a)
        • R(a);CHECK,N_GUARD::R(C)+B(F),XR(a)
        • R(a);N_GUARD,XP(H)::R(C)+B(F)
      • Refutation
        • B(c);N_SPINB(c),XB(E)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • R(a);CHECK,XP(B)::QAB(A)+K(D),XR(a)
      • R(a);CHECK::QAB(A)+K(D),XR(a)
      • R(a);XR(C)::QAB(A)+K(D)
      • R(a);N_GUARD,SBLOCK,XP(H)::R(C)+B(F)
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