MESON Chess Problem Database

Problem Display
PID: 67251 (8/8/8/8/P1RP2B1/pkB5/nn2Q3/K7 w - - 0 1)

Subotic, Miroslav

Probleemblad, 2006

8/8/8/8/P1RP2B1/pkB5/nn2Q3/K7

#2

7 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qxa2#
    • 1...Sd3
      • 2.Qxa2#
    • 1...Sxa4
      • 2.Qxa2#
  • Tries
    • 1.Be1?
      • threat
        • 2.Qc2#
      • 1...Sxc4
        • 2.Qd1#
      • 1...Sb4
        • 2.Rxb4#
      • 1...Sc3!
    • 1.Ba5?
      • threat
        • 2.Qc2#
      • 1...Sxc4
        • 2.Qd1#
      • 1...Sc3
        • 2.Rb4#
      • 1...Sb4!
    • 1.Bf5?
      • threat
        • 2.Bc2#
      • 1...Sxc4
        • 2.Qc2#
      • 1...Sd3
        • 2.Qxa2#
      • 1...Sb4!
    • 1.Qd3?
      • 1...Sxc3
        • 2.Qxc3#
      • 1...Sxa4
        • 2.Bd1#
      • 1...Sxc4
        • 2.Bd1#
      • 1...Sb4
        • 2.Rxb4#
      • 1...Sc1
        • 2.Rb4#
      • 1...Sd1
        • 2.Bxd1#
      • 1...Sxd3!
    • 1.Qc2+?
      • 1...Kxc4
        • 2.Be6#
      • 1...Kxc2!
  • Keys
    • 1.Qd2!
      • 1...Kxc4
        • 2.Be6#
      • 1...Sxc3
        • 2.Qxc3#
      • 1...Sxa4
        • 2.Qxa2#
      • 1...Sxc4
        • 2.Bd1#
      • 1...Sb4
        • 2.Rxb4#
      • 1...Sc1
        • 2.Rb4#
      • 1...Sd1
        • 2.Qxa2#
      • 1...Sd3
        • 2.Qxa2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(b);OGATE::QAB1(B),XS(a)
    • S(b);OGATE,XP(D)::QAB1(B),XS(a)
  • Tries
    • Try
      • B(C);
      • Threat
        • QAB1(B)
      • Vars
        • S(b);N_GUARD,SBLOCK,XR(E)::QAB(B)
        • S(a);N_GUARD::R1(E),XS(a)
      • Refutation
        • S(a);
    • Try
      • B(C);
      • Threat
        • QAB1(B)
      • Vars
        • S(b);N_GUARD,SBLOCK,XR(E)::QAB(B)
        • S(a);N_GUARD,SBLOCK::R1(E)
      • Refutation
        • S(a);
    • Try
      • B(G);
      • Threat
        • B(G)
      • Vars
        • S(b);SBLOCK,XR(E)::QAB1(B)
        • S(b);OGATE::QAB1(B),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(B);
      • Vars
        • S(a);OGATE,P_SPINS(a),XB(C)::QAR1(B),XS(a)
        • S(b);N_GUARD,XP(D)::B(G)
        • S(b);N_GUARD,XR(E)::B(G)
        • S(a);N_GUARD::R1(E),XS(a)
        • S(a);N_GUARD::R1(E)
        • S(b);N_GUARD::B(G),XS(b)
      • Refutation
        • S(b);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);S_FLIGHT,XR(E)::B(G)
      • Refutation
        • K(d);S_FLIGHT,XQ(B)
  • Actual
    • Q(B);
    • Vars
      • K(d);OGATEB,S_FLIGHT,XR(E)::B(G)
      • S(a);OGATE,XB(C)::QAR1(B),XS(a)
      • S(b);OGATE,XP(D)::QAB1(B),XS(a)
      • S(b);N_GUARD,SBLOCK,XR(E)::B(G)
      • S(a);N_GUARD::R1(E),XS(a)
      • S(a);N_GUARD::R1(E)
      • S(b);OGATE::QAB1(B),XS(a)
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