MESON Chess Problem Database

Problem Display
PID: 95023 (2Q5/6pK/7p/3Bqp2/3p4/pn6/1k3P1R/3RB3 w - - 0 1)

Sabol, Frantisek

Pravda, 1984

2Q5/6pK/7p/3Bqp2/3p4/pn6/1k3P1R/3RB3

#2

7 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ka2
      • 2.Qc2#
    • 1...Sa1
      • 2.Qc1#
    • 1...Sc1
      • 2.Qxc1#
    • 1...Sd2
      • 2.Qc1#
    • 1...Sa5
      • 2.Qc1#
  • Tries
    • 1.Rb1+?
      • 1...Ka2
        • 2.Qc2#
      • 1...Kxb1!
    • 1.Qc1+?
      • 1...Ka2
        • 2.Rd2#
        • 2.Qd2#
        • 2.Qa1#
        • 2.Qb1#
        • 2.Qc2#
      • 1...Sxc1!
    • 1.Qc3+?
      • 1...Ka2
        • 2.Bxb3#
        • 2.Ra1#
        • 2.Qa1#
        • 2.Qd2#
        • 2.Qc2#
        • 2.Qxb3#
      • 1...dxc3!
    • 1.Qb8?
      • threat
        • 2.Qxb3#
      • 1...Ka2
        • 2.Qxb3#
      • 1...Kc2
        • 2.Qxb3#
      • 1...Qxd5
        • 2.f3#
      • 1...Qg3
        • 2.fxg3#
      • 1...Qe3
        • 2.fxe3#
      • 1...Qxb8!
    • 1.f4+?
      • 1...Sd2
        • 2.Rhxd2#
        • 2.Qc1#
      • 1...Qe2!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qxb3#
      • 1...Ka2
        • 2.Qxb3#
      • 1...Kc2
        • 2.Qxb3#
      • 1...Qxd5
        • 2.f3#
      • 1...Qg3
        • 2.fxg3#
      • 1...Qb8
        • 2.f4#
      • 1...Qe3
        • 2.fxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • K(a);P-FLIGHT,P_SPINS(c)::QAR2(G)
    • S(c);N_GUARD::QAB1(G)
    • S(c);N_GUARD::QAB1(G),XS(c)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINS(c)::QAR2(G)
      • Refutation
        • K(a);P-FLIGHT,XR(A)
    • Try
      • Q(G);CHECK
      • Refutation
        • S(c);XQ(G)
    • Try
      • Q(G);CHECK
      • Refutation
        • P(d);XQ(G)
    • Try
      • Q(G);P_PINS(c)
      • Threat
        • QAR1(G),XS(c)
      • Vars
        • K(a);P-FLIGHT::QAB1(G),XS(c)
        • K(a);N_SPINS(c),P-FLIGHT::QAB1(G),XS(c)
        • Q(e);N_GUARD,XB(E)::R(D)+P(C)
        • Q(e);OGATE::R(D)+P(C),XQ(e)
      • Refutation
        • Q(e);N_SPINS(c),XQ(G)
    • Try
      • P(C);CHECK
      • Refutation
        • Q(e);P_SPINQ(e)
  • Actual
    • Q(G);P_PINS(c)
    • Threat
      • QAR1(G),XS(c)
    • Vars
      • K(a);P-FLIGHT::QAB1(G),XS(c)
      • K(a);N_SPINS(c),P-FLIGHT::QAB1(G),XS(c)
      • Q(e);N_GUARD,XB(E)::R(D)+P(C)
      • Q(e);OGATE::R(D)+P(C),XQ(e)
      • Q(e);N_GUARD::R(D)+P(C)
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