MESON Chess Problem Database

Problem Display
PID: 133559 (k1K4Q/p7/n1p5/8/N7/8/8/8 w - - 0 1)

Prcic, Mike

Sp. HM., Uralski Problemist, 2007

k1K4Q/p7/n1p5/8/N7/8/8/8

#2

3 + 4

145 StrateGems 2008
23 Die Schwalbe 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Kc7#
    • 1...Sc5
      • 2.Kc7#
    • 1...Sc7
      • 2.Kxc7#
    • 1...c5
      • 2.Qh1#
  • Tries
    • 1.Kd7+?
      • 1...Kb7
        • 2.Qc8#
      • 1...Sb8+!
    • 1.Sb2?
      • 1...Sb4
        • 2.Kc7#
      • 1...Sc5
        • 2.Kc7#
      • 1...Sc7
        • 2.Kxc7#
      • 1...c5
        • 2.Qh1#
      • 1...Sb8!
    • 1.Sc3?
      • 1...Sb4
        • 2.Kc7#
      • 1...Sc5
        • 2.Kc7#
      • 1...Sc7
        • 2.Kxc7#
      • 1...c5
        • 2.Qh1#
      • 1...Sb8!
    • 1.Sc5?
      • 1...Sxc5
        • 2.Kc7#
      • 1...Sb4
        • 2.Kc7#
        • 2.Kd7#
      • 1...Sc7
        • 2.Kxc7#
      • 1...Sb8!
    • 1.Qb2?
      • threat
        • 2.Qb7#
      • 1...Sc5
        • 2.Qb8#
      • 1...Sb4!
    • 1.Qe5?
      • 1...Sb8
        • 2.Qxb8#
      • 1...Sb4
        • 2.Qb8#
      • 1...Sc5
        • 2.Qb8#
      • 1...c5
        • 2.Qe4#
        • 2.Qd5#
      • 1...Sc7!
    • 1.Qh2?
      • 1...Sb8
        • 2.Qxb8#
      • 1...Sb4
        • 2.Qb8#
      • 1...Sc5
        • 2.Qb8#
      • 1...c5
        • 2.Qh1#
        • 2.Qg2#
      • 1...Sc7!
    • 1.Qd8?
      • 1...Sb4
        • 2.Kc7#
      • 1...Sc5
        • 2.Kc7#
      • 1...Sc7
        • 2.Kxc7#
      • 1...c5
        • 2.Qd5#
      • 1...Sb8!
    • 1.Qe8?
      • threat
        • 2.Qxc6#
      • 1...Sb4
        • 2.Kc7#
      • 1...Sc5
        • 2.Kc7#
      • 1...c5
        • 2.Qc6#
        • 2.Qe4#
      • 1...Sb8!
    • 1.Qf8?
      • 1...Sb4
        • 2.Kc7#
      • 1...Sc5
        • 2.Kc7#
      • 1...Sc7
        • 2.Kxc7#
      • 1...c5
        • 2.Qf3#
      • 1...Sb8!
    • 1.Qg8?
      • 1...Sb4
        • 2.Kc7#
      • 1...Sc5
        • 2.Kc7#
      • 1...Sc7
        • 2.Kxc7#
      • 1...c5
        • 2.Qd5#
        • 2.Qg2#
      • 1...Sb8!
  • Keys
    • 1.Qa1!
      • 1...Sb8
        • 2.Sb6#
      • 1...Sb4
        • 2.Sb6#
      • 1...Sc5
        • 2.Sb6#
      • 1...Sc7
        • 2.Sb6#
      • 1...c5
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(a);::QAR(C)+K(B)
    • S(a);::QAR(C)+K(B),XS(a)
    • P(b);OGATEB::QAB(C)
  • Tries
    • Try
      • K(B);CHECK,S_FLIGHT
      • Vars
        • K(d);S_FLIGHT::QAB1(C)
      • Refutation
        • S(a);CHECK,P_SPINS(a)
    • Try
      • S(A);
      • Vars
        • S(a);::QAR(C)+K(B)
        • S(a);::QAR(C)+K(B),XS(a)
        • P(b);OGATEB::QAB(C)
      • Refutation
        • S(a);
    • Try
      • S(A);
      • Vars
        • S(a);::QAR(C)+K(B)
        • S(a);::QAR(C)+K(B),XS(a)
        • P(b);OGATEB::QAB(C)
      • Refutation
        • S(a);
    • Try
      • S(A);
      • Vars
        • S(a);XS(A)::QAR(C)+K(B)
        • S(a);::QAR(C)+K(B),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • S(a);N_GUARD::QAR1(C)
      • Refutation
        • S(a);
    • Try
      • Q(C);
      • Vars
        • S(a);N_GUARD::QAR1(C),XS(a)
        • S(a);N_GUARD::QAR1(C)
      • Refutation
        • S(a);
    • Try
      • Q(C);
      • Vars
        • S(a);N_GUARD::QAR1(C),XS(a)
        • S(a);N_GUARD::QAR1(C)
      • Refutation
        • S(a);
    • Try
      • Q(C);
      • Vars
        • S(a);::QAR(C)+K(B)
        • S(a);::QAR(C)+K(B),XS(a)
        • P(b);OGATEB::QAB(C)
      • Refutation
        • S(a);
    • Try
      • Q(C);
      • Threat
        • QAB(C),XP(b)
      • Vars
        • S(a);::QAR(C)+K(B)
      • Refutation
        • S(a);
    • Try
      • Q(C);
      • Vars
        • S(a);::QAR(C)+K(B)
        • S(a);::QAR(C)+K(B),XS(a)
        • P(b);OGATEB::QAB(C)
      • Refutation
        • S(a);
    • Try
      • Q(C);
      • Vars
        • S(a);::QAR(C)+K(B)
        • S(a);::QAR(C)+K(B),XS(a)
      • Refutation
        • S(a);
  • Actual
    • Q(C);
    • Vars
      • S(a);S_CUTP(c)::S(A)
      • P(b);OGATEB::QAB(C)
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