MESON Chess Problem Database

Problem Display
PID: 54764 (4QK2/4P3/3pRB2/5k2/4Rp2/4P3/6P1/3q4 w - - 0 1)

Labai, Zoltan

Problemista 35. JT, 1997

4QK2/4P3/3pRB2/5k2/4Rp2/4P3/6P1/3q4

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kg4
      • 2.Qg6#
    • 1...Qc2
      • 2.Qh5#
    • 1...Qb3
      • 2.Qh5#
    • 1...Qa4
      • 2.Qh5#
    • 1...Qh5
      • 2.Qxh5#
    • 1...Qa1
      • 2.Qh5#
    • 1...Qb1
      • 2.Qh5#
    • 1...Qc1
      • 2.Qh5#
    • 1...Qe1
      • 2.Qh5#
    • 1...Qf1
      • 2.Qh5#
    • 1...Qg1
      • 2.Qh5#
    • 1...Qd2
      • 2.Qh5#
    • 1...Qd3
      • 2.Qh5#
    • 1...Qd4
      • 2.Qh5#
    • 1...Qd5
      • 2.Qh5#
    • 1...f3
      • 2.Qh5#
      • 2.g4#
  • Tries
    • 1.Kg7?
      • threat
        • 2.Qg6#
      • 1...Kg4
        • 2.Qg6#
      • 1...Qh5
        • 2.Qxh5#
      • 1...Qg4+!
    • 1.R4e5+?
      • 1...Kg4
        • 2.Qg6#
      • 1...dxe5!
    • 1.R6e5+?
      • 1...Kg4
        • 2.Qg6#
      • 1...Kxf6
        • 2.Qf7#
      • 1...dxe5!
    • 1.Qf7?
      • threat
        • 2.Rxf4#
      • 1...Kg4
        • 2.Qg6#
      • 1...fxe3
        • 2.Bh4#
        • 2.Qh7#
      • 1...Qa4
        • 2.Qh5#
      • 1...Qg4
        • 2.Bh4#
      • 1...Qf1
        • 2.Qh5#
      • 1...Qd4
        • 2.Qh5#
      • 1...f3
        • 2.Bh4#
        • 2.Rf4#
        • 2.Qh5#
        • 2.Qh7#
        • 2.g4#
      • 1...Qf3!
  • Keys
    • 1.Bh4!
      • threat
        • 2.Qg6#
      • 1...Kg4
        • 2.Rxf4#
      • 1...Qg4
        • 2.Qf7#
      • 1...Qh5
        • 2.Qxh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 13
  • Sets
    • K(c);P_SPINP(b),S_FLIGHT::QAR2(G)
    • Q(a);N_GUARD::QAR2(G)
    • Q(a);N_GUARD::QAR2(G),XQ(a)
  • Tries
    • Try
      • K(H);S_FLIGHT
      • Threat
        • QAB1(G)
      • Vars
        • K(c);P_SPINP(b),S_FLIGHT::QAR2(G)
        • Q(a);N_GUARD::QAR2(G),XQ(a)
      • Refutation
        • Q(a);CHECK
    • Try
      • R(C);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR2(G)
      • Refutation
        • P(d);XR(C)
    • Try
      • R(D);CHECK
      • Vars
        • K(c);P_SPINP(b),S_FLIGHT::QAR2(G)
        • K(c);P-FLIGHT,XB(E)::QAR1(G)
      • Refutation
        • P(d);XR(D)
    • Try
      • Q(G);
      • Threat
        • R1(C),XP(b)
      • Vars
        • K(c);P_SPINP(b),S_FLIGHT::QAR2(G)
        • Q(a);N_GUARD::QAR2(G)
        • Q(a);SBLOCK::QAR(G)+B(E)
      • Refutation
        • Q(a);
  • Actual
    • B(E);
    • Threat
      • QAB1(G)
    • Vars
      • K(c);P_SPINP(b),S_FLIGHT::R1(C),XP(b)
      • Q(a);SBLOCK::QAR2(G)
      • Q(a);N_GUARD::QAR2(G),XQ(a)
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