MESON Chess Problem Database

Problem Display
PID: 107945 (1K2B3/4p3/1p4pr/RNk4r/3R4/nP6/2p5/1q3Q2 w - - 0 1)

Czako, Laszlo

Szoghy-70 JT, 1981

1K2B3/4p3/1p4pr/RNk4r/3R4/nP6/2p5/1q3Q2

#2

7 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.b4#
    • 1...Qa1
      • 2.b4#
    • 1...Qc1
      • 2.b4#
    • 1...Qd1
      • 2.b4#
    • 1...Qxf1
      • 2.b4#
    • 1...Sc4
      • 2.Qxc4#
    • 1...Sxb5
      • 2.Qc4#
    • 1...e5
      • 2.Qf8#
    • 1...e6
      • 2.Qf8#
  • Tries
    • 1.Rc4+?
      • 1...Sxc4
        • 2.Qxc4#
      • 1...Kd5!
    • 1.Ra7?
      • threat
        • 2.Rc7#
      • 1...Sxb5
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...g5!
    • 1.Qg2?
      • threat
        • 2.Qc6#
      • 1...Sc4
        • 2.Rxc4#
      • 1...Qh1
        • 2.b4#
      • 1...Rd5
        • 2.Qxd5#
      • 1...g5
        • 2.Qd5#
      • 1...Sxb5!
    • 1.Qf4?
      • threat
        • 2.Qc7#
      • 1...Sxb5
        • 2.Rxb5#
      • 1...Qh1
        • 2.b4#
      • 1...Re5
        • 2.Qxe5#
      • 1...g5
        • 2.Qe5#
      • 1...e5
        • 2.Qf8#
      • 1...Sc4!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qc6#
      • 1...Sxb5
        • 2.Qc3#
      • 1...Sc4
        • 2.Rxc4#
      • 1...Qh1
        • 2.b4#
      • 1...Rd5
        • 2.Qxd5#
      • 1...g5
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • Q(a);N_GUARD::P(B)
    • Q(a);N_GUARD,XQ(A)::P(B)
    • S(c);N_GUARD::QAR1(A),XS(c)
    • S(c);N_GUARD,P_SPINS(c),XS(E)::QAR1(A)
    • P(i);OGATEB::QAB(A)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • S(c);OGATE,XR(C)::QAR1(A),XS(c)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • R(D);
      • Threat
        • R(D)
      • Vars
        • S(c);N_GUARD,XS(E)::QAR1(A)
        • S(c);N_GUARD::QAR1(A),XS(c)
      • Refutation
        • P(g);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(c);N_GUARD::R1(C),XS(c)
        • Q(a);N_GUARD::P(B)
        • R(e);N_GUARD::QAR1(A),XR(e)
        • P(g);S_CUTR(e)::QAR1(A)
      • Refutation
        • S(c);P_SPINS(c),XS(E)
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • S(c);OGATE,P_SPINS(c),XS(E)::R1(D),XS(c)
        • Q(a);N_GUARD::P(B)
        • R(e);N_GUARD::QAR2(A),XR(e)
        • P(g);S_CUTR(e)::QAR2(A)
        • P(i);OGATEB::QAB(A)
      • Refutation
        • S(c);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • S(c);N_GUARD,P_SPINS(c),XS(E)::QAR2(A)
      • S(c);N_GUARD::R1(C),XS(c)
      • Q(a);N_GUARD::P(B)
      • R(e);N_GUARD::QAR1(A),XR(e)
      • P(g);S_CUTR(e)::QAR1(A)
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