MESON Chess Problem Database

Problem Display
PID: 110170 (3R4/3Qp3/3N4/bPP1P2r/1q1kP3/1p1N4/1P3P2/1K1R3b w - - 0 1)

Labai, Zoltan

4th HM., Sachove umeni (Ceskoslovensky sach), 1975

3R4/3Qp3/3N4/bPP1P2r/1q1kP3/1p1N4/1P3P2/1K1R3b

#2

12 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sc4+?
      • 1...Kxe4
        • 2.Qg4#
      • 1...Kxc4!
    • 1.Sf5+?
      • 1...Kc4
        • 2.Se3#
      • 1...Kxe4!
    • 1.Sb7+?
      • 1...Kxe4
        • 2.Qg4#
      • 1...Kc4!
    • 1.Sf7+?
      • 1...Kxe4
        • 2.Qg4#
      • 1...Kc4!
    • 1.Sc8+?
      • 1...Kxe4
        • 2.Qg4#
      • 1...Kc4!
    • 1.Se8+?
      • 1...Kxe4
        • 2.Qg4#
      • 1...Kc4!
    • 1.Qc6?
      • threat
        • 2.Qd5#
      • 1...Qxc5
        • 2.Qxc5#
      • 1...Rxe5
        • 2.Sxb4#
      • 1...Bxe4
        • 2.Qxe4#
      • 1...Qc4
        • 2.Sf5#
      • 1...e6!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Qd5#
      • 1...Qxc5
        • 2.Sb4#
      • 1...Rxe5
        • 2.Qxe5#
      • 1...Bxe4
        • 2.Sf5#
      • 1...Qc4
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(J);CHECK
      • Vars
        • K(d);P-FLIGHT,XP(F)::QAR2(K)
      • Refutation
        • K(d);P-FLIGHT,XS(J)
    • Try
      • S(J);CHECK
      • Vars
        • K(d);P-FLIGHT::S(J)
      • Refutation
        • K(d);P-FLIGHT,XP(F)
    • Try
      • S(J);CHECK
      • Vars
        • K(d);P-FLIGHT,XP(F)::QAR2(K)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • S(J);CHECK
      • Vars
        • K(d);P-FLIGHT,XP(F)::QAR2(K)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • S(J);CHECK
      • Vars
        • K(d);P-FLIGHT,XP(F)::QAR2(K)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • S(J);CHECK
      • Vars
        • K(d);P-FLIGHT,XP(F)::QAR2(K)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(K);
      • Threat
        • QAR1(K)
      • Vars
        • Q(c);OGATE,XP(H)::QAB1(K),XQ(c)
        • R(f);SBLOCK,XP(I)::R(B)+S(E),XQ(c)
        • B(a);OGATE,P_PINS(E),XP(F)::QAR1(K),XB(a)
        • Q(c);SBLOCK::R(L)+S(J),DCHECK
      • Refutation
        • P(g);
  • Actual
    • Q(K);
    • Threat
      • QAR1(K)
    • Vars
      • Q(c);SBLOCK,XP(H)::R(B)+S(E)
      • R(f);OGATE,XP(I)::QAB1(K),XR(f)
      • B(a);P_PINS(E),SBLOCK,XP(F)::R(L)+S(J),DCHECK
      • Q(c);N_GUARD::QAR1(K),XQ(c)
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