MESON Chess Problem Database

Problem Display
PID: 41920 (3R4/2p1B1P1/2P4p/2Nnk2p/5n2/K6P/4B1N1/4QR2 w - - 0 1)

Zappas, Byron

3rd HM., Probleemblad, 1984

3R4/2p1B1P1/2P4p/2Nnk2p/5n2/K6P/4B1N1/4QR2

#2

11 + 6

3748 FIDE Album (1983-1985) 1992

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qa1#
    • 1...Kf5
      • 2.Bd3#
  • Tries
    • 1.Bd3+?
      • 1...Kd4
        • 2.Rxf4#
        • 2.Qa1#
      • 1...Se3
        • 2.Qc3#
        • 2.Qa1#
        • 2.Qxe3#
      • 1...Se2!
    • 1.Bc4+?
      • 1...Kd4
        • 2.Rxf4#
      • 1...Kf5
        • 2.Sh4#
        • 2.Bd3#
        • 2.Qe4#
        • 2.Qe6#
      • 1...Se2
        • 2.Rxd5#
      • 1...Se3!
    • 1.Bg4+?
      • 1...Kd4
        • 2.Rxf4#
      • 1...Se3
        • 2.Qc3#
        • 2.Qa1#
        • 2.Qxe3#
      • 1...Se2!
    • 1.Qc3+?
      • 1...Kf5
        • 2.Sh4#
        • 2.Bd3#
      • 1...Sxc3!
    • 1.Qg3?
      • 1...Kd4
        • 2.Qe3#
      • 1...Kf5
        • 2.Rxd5#
      • 1...Sxe7
        • 2.Qxf4#
      • 1...Sc3
        • 2.Qxf4#
      • 1...Se3
        • 2.Qxf4#
      • 1...Sb4
        • 2.Qxf4#
      • 1...Sb6
        • 2.Qxf4#
      • 1...Sf6
        • 2.Qxf4#
      • 1...h4!
    • 1.Qb4?
      • threat
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
      • 1...Sxe7
        • 2.Qxf4#
      • 1...Sc3
        • 2.Qxf4#
      • 1...Sf6
        • 2.Qxf4#
      • 1...Sxb4!
    • 1.Qa1+?
      • 1...Kf5
        • 2.Sh4#
        • 2.Bd3#
      • 1...Sc3!
  • Keys
    • 1.Qh4!
      • 1...Kd4
        • 2.Qf6#
      • 1...Kf5
        • 2.Qxh5#
      • 1...Sxe2
        • 2.Qe4#
      • 1...Sxg2
        • 2.Qe4#
      • 1...Sxh3
        • 2.Qe4#
      • 1...Sxe7
        • 2.Qxf4#
      • 1...Sd3
        • 2.Qe4#
      • 1...Se6
        • 2.Sd3#
        • 2.Sd7#
        • 2.Qe4#
      • 1...Sg6
        • 2.Qe4#
      • 1...Sc3
        • 2.Qf6#
        • 2.Qxf4#
      • 1...Se3
        • 2.Qf6#
        • 2.Qxf4#
      • 1...Sb4
        • 2.Qf6#
        • 2.Qxf4#
      • 1...Sb6
        • 2.Qf6#
        • 2.Qxf4#
      • 1...Sf6
        • 2.Qxf6#
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(c);P_SPINS(b),S_FLIGHT::QAB(A)
    • K(c);P-FLIGHT,P_SPINS(a)::B(C)
  • Tries
    • Try
      • B(C);CHECK
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • B(C);CHECK
      • Vars
        • K(c);P_SPINS(b),S_FLIGHT::R(B),XS(a)
        • S(a);P_SPINS(a)::R1(K),XS(b)
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • B(C);CHECK
      • Vars
        • K(c);P_SPINS(b),S_FLIGHT::R(B),XS(a)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(A);CHECK
      • Refutation
        • S(b);XQ(A)
    • Try
      • Q(A);P_PINS(a)
      • Vars
        • K(c);N_SPINS(a),P_SPINS(b),S_FLIGHT::QAB1(A)
        • K(c);P-FLIGHT::R(K),XS(b)
        • S(b);N_GUARD,XB(I)::QAB1(A),XS(a)
        • S(b);N_GUARD::QAB1(A),XS(a)
      • Refutation
        • P(d);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(c);P-FLIGHT,P_SPINS(a)::QAB1(A)
        • S(b);N_GUARD,XB(I)::QAB1(A),XS(a)
        • S(b);N_GUARD::QAB1(A),XS(a)
      • Refutation
        • S(b);XQ(A)
    • Try
      • Q(A);CHECK
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • Q(A);
    • Vars
      • K(c);P_SPINS(a),S_FLIGHT::QAB(A)
      • K(c);P-FLIGHT,P_SPINS(a)::QAR2(A),XP(d)
      • S(a);OGATE,XB(C)::QAR1(A)
      • S(a);OGATE,XS(D)::QAR1(A)
      • S(a);OGATE,XP(F)::QAR1(A)
      • S(b);N_GUARD,XB(I)::QAB1(A),XS(a)
      • S(a);OGATE::QAR1(A)
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