MESON Chess Problem Database

Problem Display
PID: 95728 (1q1b4/1R6/4pP1N/2p1k2K/n1Q1Np1p/6p1/7B/5R1B w - - 0 1)

Zarhs, Aleksandr

L'Italia Scacchistica, 1999

1q1b4/1R6/4pP1N/2p1k2K/n1Q1Np1p/6p1/7B/5R1B

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Qxc5#
    • 1...g2
      • 2.Bxf4#
  • Tries
    • 1.Kg5?
      • threat
        • 2.Sg4#
        • 2.Sf7#
      • 1...Qxb7
        • 2.Sg4#
      • 1...Qc7
        • 2.Sg4#
      • 1...Bxf6+!
    • 1.Kg6?
      • threat
        • 2.Sg4#
        • 2.Sf7#
      • 1...Qxb7
        • 2.Sg4#
      • 1...Qc7
        • 2.Sg4#
      • 1...f3!
    • 1.Bxg3?
      • threat
        • 2.Bxf4#
      • 1...fxg3
        • 2.Sg4#
        • 2.Sf7#
      • 1...hxg3!
  • Keys
    • 1.Sxg3!
      • threat
        • 2.Qxf4#
      • 1...Kd6
        • 2.Sf7#
      • 1...Kxf6
        • 2.Sg4#
      • 1...fxg3
        • 2.Sf7#
        • 2.Qf4#
      • 1...f3
        • 2.Se4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(b);N_GUARD::QAR2(D),XP(e)
    • P(a);OGATE,P_SPINP(c)::B(C),XP(c)
  • Tries
    • Try
      • K(F);P-FLIGHT,P_SPINP(G)
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);XR(I)::S(H)
        • Q(h);::S(H)
      • Refutation
        • B(i);CHECK,XP(G)
    • Try
      • K(F);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);XR(I)::S(H)
        • Q(h);::S(H)
      • Refutation
        • P(c);P_SPINP(a)
    • Try
      • B(C);P_PINP(c),XP(a)
      • Threat
        • B(C),XP(c)
      • Refutation
        • P(d);N_SPINP(c),XB(C)
  • Actual
    • S(E);XP(a)
    • Threat
      • QAB1(D),XP(c)
    • Vars
      • K(f);S_FLIGHT::S(H)
      • K(f);P_SPINP(c),S_FLIGHT,XP(G)::S(H)
      • P(c);::B(C)+S(E)
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