MESON Chess Problem Database

Problem Display
PID: 235428 (b4K1B/n7/N1Rp4/3pr3/RbNkP2Q/Pnp1p3/BrPpP3/8 w - - 0 1)

Pituk, Alexander

Schach, 1978

b4K1B/n7/N1Rp4/3pr3/RbNkP2Q/Pnp1p3/BrPpP3/8

#2

12 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bxa3
      • 2.Sxa3#
    • 1...Ba5
      • 2.Sxa5#
  • Tries
    • 1.Sb6?
      • threat
        • 2.Rxb4#
        • 2.exd5#
      • 1...Sxc6
        • 2.exd5#
      • 1...dxe4
        • 2.Rxb4#
        • 2.Rc4#
      • 1...Sa1
        • 2.exd5#
      • 1...Sc1
        • 2.exd5#
      • 1...Sa5
        • 2.exd5#
      • 1...Sc5!
    • 1.Sxd6?
      • threat
        • 2.Rxb4#
      • 1...dxe4
        • 2.Qxe4#
      • 1...Sa1
        • 2.exd5#
      • 1...Sc1
        • 2.exd5#
      • 1...Sa5
        • 2.exd5#
      • 1...Sc5
        • 2.Sf5#
      • 1...Sxc6!
  • Keys
    • 1.Rxd6!
      • threat
        • 2.exd5#
      • 1...Bxd6+
        • 2.Sxd6#
      • 1...Kxc4
        • 2.Rxb4#
      • 1...Sc5
        • 2.Bxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(f);XP(D)::R(E)+S(F),XB(f)
    • B(f);::R(E)+S(F),XB(f)
  • Tries
    • Try
      • S(F);P_PINB(f)
      • Threat
        • DUALS(2)
      • Vars
        • S(k);XR(J)::QAR(H)+P(G),XP(h)
        • S(c);::QAR(H)+P(G),XP(h)
      • Refutation
        • S(c);
    • Try
      • S(F);P_PINB(f),P_SPINS(F),XP(j)
      • Threat
        • R(E),XB(f)
      • Vars
        • P(h);OGATE,P_SPINP(h),XP(G)::QAR1(H),XP(h)
        • S(c);::QAR(H)+P(G),XP(h)
        • S(c);N_PINS(F)::S(F)
      • Refutation
        • S(k);XR(J)
  • Actual
    • R(J);P_PINP(h),P_SPINR(J),XP(j)
    • Threat
      • QAR(H)+P(G),XP(h)
    • Vars
      • B(f);CHECK,N_SPINP(h),XR(J)::R(E)+S(F),XB(f)
      • K(g);N_SPINP(h),N_SPINR(i),OGATEB,P-FLIGHT,P_SPINB(f),P_SPINS(c),XS(F)::R1(E),XB(f)
      • S(c);N_PINR(J)::B(L),XR(i)
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