MESON Chess Problem Database

Problem Display
PID: 99864 (BB3N2/3pRPKb/2nNq1P1/4kPp1/3pp3/2p3P1/8/b1QR4 w - - 0 1)

Pituk, Alexander

Magyar Sakkelet, 1985

BB3N2/3pRPKb/2nNq1P1/4kPp1/3pp3/2p3P1/8/b1QR4

#2

12 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Sxd7#
    • 1...Sa5
      • 2.Sxd7#
    • 1...Sa7
      • 2.Sxd7#
    • 1...Sd8
      • 2.Sxd7#
  • Tries
    • 1.Qa3?
      • threat
        • 2.Qc5#
      • 1...Kd5
        • 2.Qa5#
      • 1...Sb4
        • 2.Sxd7#
      • 1...Sxe7!
    • 1.Qxg5?
      • threat
        • 2.fxe6#
        • 2.f6#
      • 1...Kd5
        • 2.fxe6#
      • 1...Qxe7
        • 2.f6#
      • 1...Bxg6
        • 2.fxg6#
      • 1...Sxe7
        • 2.Sc4#
        • 2.Qf4#
      • 1...Sxb8
        • 2.Sc4#
        • 2.Qf4#
      • 1...d3!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Qxe4#
      • 1...Kd5
        • 2.Qxd4#
      • 1...Sxb8
        • 2.Qxd4#
      • 1...dxe3
        • 2.Sxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • S(g);::S(L),XP(i)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • K(e);N_SPINQ(h),P-FLIGHT,P_SPINP(c),P_SPINS(g)::QAR(A)
        • S(g);::S(L),XP(i)
      • Refutation
        • S(g);N_SPINQ(h),XR(G)
    • Try
      • Q(A);XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • K(e);N_SPINQ(h),P-FLIGHT,P_SPINP(c),P_SPINS(g)::QAR(A)+P(D),XQ(h)
        • Q(h);N_SPINQ(h),P_PINP(H),XR(G)::QAR(A)+P(D)
        • B(j);OGATE,XP(F)::QAR(A)+P(D),XB(j)
      • Refutation
        • P(c);
  • Actual
    • Q(A);P_PINP(d)
    • Threat
      • QAR1(A),XP(d)
    • Vars
      • K(e);N_SPINP(d),N_SPINQ(h),P-FLIGHT,P_SPINP(c),P_SPINS(g)::QAR1(A),XP(c)
      • S(g);N_GUARD,XB(K)::QAB1(A),XP(c)
      • P(c);N_SPINP(d),XQ(A)::S(L),XP(i)
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