MESON Chess Problem Database

Problem Display
PID: 250877 (1q2B3/p7/3p4/Q1N1bRB1/1p1kP1p1/1K1P4/1R6/7n w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Ustiantsiev, V

The Problemist, 1991

1q2B3/p7/3p4/Q1N1bRB1/1p1kP1p1/1K1P4/1R6/7n

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qc7
      • 2.Qxb4#
    • 1...Qa8
      • 2.Qxb4#
    • 1...Qc8
      • 2.Qxb4#
    • 1...Qd8
      • 2.Qxb4#
    • 1...Qxe8
      • 2.Qxb4#
    • 1...Bh2
      • 2.Rd5#
    • 1...Bg3
      • 2.Rd5#
    • 1...Bf6
      • 2.Rd5#
    • 1...Bg7
      • 2.Rd5#
    • 1...Bh8
      • 2.Rd5#
  • Tries
    • 1.Rd2?
      • threat
        • 2.Se6#
      • 1...Qxe8
        • 2.Qxb4#
      • 1...dxc5
        • 2.Qa1#
      • 1...Qc8
        • 2.Qxb4#
      • 1...Bf4!
    • 1.Re2?
      • threat
        • 2.Be3#
      • 1...Bf4
        • 2.Rd5#
        • 2.Qa1#
      • 1...dxc5!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Rc2#
      • 1...Kxc5
        • 2.Be3#
      • 1...dxc5
        • 2.Rd2#
      • 1...Bf4
        • 2.Re2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 10
  • Sets
    • Q(h);N_GUARD::QAR2(E),XP(b)
    • Q(h);N_GUARD,XB(I)::QAR2(E),XP(b)
    • B(e);OGATE::R1(G)
  • Tries
    • Try
      • R(A);
      • Threat
        • S(F)
      • Vars
        • Q(h);N_GUARD,XB(I)::QAR2(E),XP(b)
        • P(f);SBLOCK,XS(F)::QAB(E)
        • Q(h);N_GUARD::QAR2(E),XP(b)
      • Refutation
        • B(e);
    • Try
      • R(A);
      • Threat
        • B(H)
      • Refutation
        • P(f);XS(F)
  • Actual
    • Q(E);
    • Threat
      • QAB(E)+R(A)
    • Vars
      • K(c);N_GUARD,P_SPINB(e),S_FLIGHT,XS(F)::B(H)
      • P(f);SBLOCK,XS(F)::QAB(E)+R(A)
      • B(e);::QAB(E)+R(A)
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