MESON Chess Problem Database

Problem Display
PID: 137985 (5Q2/B7/8/8/b7/3RrB2/1K1RN2N/4k3 w - - 0 1)

Chepizhni, Viktor Ivanovich

Sp. Prize, Shakhmaty v SSSR, 1978

5Q2/B7/8/8/b7/3RrB2/1K1RN2N/4k3

#2

8 + 3

6167 Viktor Chepizhny 2007
145 StrateGems 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe2
      • 2.Rxe2#
  • Tries
    • 1.Sf4?
      • threat
        • 2.Sg2#
      • 1...Re2
        • 2.Rxe2#
      • 1...Rxd3!
    • 1.Bg2?
      • threat
        • 2.Qf1#
      • 1...Rf3
        • 2.Sxf3#
      • 1...Rxd3!
    • 1.Rd1+?
      • 1...Kf2
        • 2.Sg4#
        • 2.Bxe3#
        • 2.Rf1#
      • 1...Bxd1!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qh4#
      • 1...Kf2
        • 2.Qh4#
      • 1...Rxe2
        • 2.Rxe2#
      • 1...Rxd3
        • 2.Rxd3#
      • 1...Rxf3
        • 2.Rc2#
      • 1...Re4
        • 2.Rd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(b);OGATE,P_PINR(B),XS(C)::R1(B),XR(b)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • R(b);N_GUARD,P_PINR(B)::R1(B),XR(b)
      • Refutation
        • R(b);XR(E)
    • Try
      • B(F);
      • Threat
        • QAR1(H)
      • Vars
        • R(b);N_GUARD::S(D),XR(b)
      • Refutation
        • R(b);XR(E)
    • Try
      • R(B);CHECK
      • Refutation
        • B(c);XR(B)
  • Actual
    • Q(H);
    • Threat
      • QAB(H)
    • Vars
      • K(a);P_SPINR(b),S_FLIGHT::QAB(H)
      • R(b);OGATE,P_PINR(B),XS(C)::QAB(H)+R(B),DCHECK,XR(b)
      • R(b);OGATE,XR(E)::QAB(H)+R(B),XR(b)
      • R(b);XB(F)::QAB(H)+R(B)
      • R(b);::QAB(H)+R(B),DCHECK
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