MESON Chess Problem Database

Problem Display
PID: 237022 (3N3b/6Q1/1pPKP3/pR1Pr2n/3k1np1/1PrP2R1/3PP3/6NB w - - 0 1)

Pituk, Alexander

Szachy, 1952

3N3b/6Q1/1pPKP3/pR1Pr2n/3k1np1/1PrP2R1/3PP3/6NB

#2

14 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc6+
      • 2.Sxc6#
    • 1...Sxe2
      • 2.Sxe2#
    • 1...Sxd3
      • 2.e3#
    • 1...Sxd5
      • 2.Rxd5#
    • 1...Sxe6
      • 2.Sxe6#
  • Tries
    • 1.Rxg4?
      • threat
        • 2.Sf3#
      • 1...Rxc6+
        • 2.Sxc6#
      • 1...Rxd3!
    • 1.Rb4+?
      • 1...Rc4
        • 2.Rxc4#
      • 1...axb4!
  • Keys
    • 1.Qxg4!
      • threat
        • 2.Sf3#
      • 1...Rxc6+
        • 2.Sxc6#
      • 1...Rxd5+
        • 2.Rxd5#
      • 1...Rxe6+
        • 2.Sxe6#
      • 1...Rxd3
        • 2.Rxd3#
      • 1...Rxe2
        • 2.Sxe2#
      • 1...Re3
        • 2.dxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • R(a);CHECK,XP(J)::S(N),XR(a)
    • S(c);XP(D)::S(A),XS(c)
    • S(c);SBLOCK,XP(F)::P(D)
    • S(c);OGATE,XP(I)::R1(H),XS(c)
    • S(c);XP(L)::S(N),XS(c)
  • Tries
    • Try
      • R(G);P_PINS(c),XP(d)
      • Threat
        • S(A)
      • Vars
        • R(a);CHECK,XP(J)::S(N),XR(a)
      • Refutation
        • R(a);XP(F)
    • Try
      • R(H);CHECK
      • Vars
        • R(a);N_GUARD,N_SPINR(f),P_SPINR(a)::R1(H),XR(a)
      • Refutation
        • P(e);XR(H)
  • Actual
    • Q(M);N_PINR(f),P_PINS(c),XP(d)
    • Threat
      • S(A)
    • Vars
      • R(a);CHECK,XP(J)::S(N),XR(a)
      • R(f);CHECK,OGATE,XP(I)::R1(H),XR(f)
      • R(f);CHECK,XP(L)::S(N),XR(f)
      • R(a);OGATE,XP(F)::R1(G),XR(a)
      • R(f);XP(D)::S(A),XR(f)
      • R(f);OGATE::P(C),XR(f)
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