MESON Chess Problem Database

Problem Display
PID: 56253 (2R5/2BP1Q2/B1K5/8/4P3/1ppPP3/1NkN4/7R w - - 0 1)

Casa, Alex

StrateGems, 2004

2R5/2BP1Q2/B1K5/8/4P3/1ppPP3/1NkN4/7R

#2

12 + 3

56 The Problemist 2005

SOLUTION

  • SOUND
  • Sets
    • 1...Kxb2
      • 2.Qxb3#
    • 1...Kxd2
      • 2.Qf2#
  • Tries
    • 1.Kb5?
      • 1...Kxb2
        • 2.Qxb3#
      • 1...Kxd2
        • 2.Qf2#
      • 1...cxd2
        • 2.Be5#
      • 1...cxb2!
    • 1.Kd5?
      • 1...Kxd2
        • 2.Qf2#
      • 1...cxb2
        • 2.Ba5#
      • 1...cxd2
        • 2.Be5#
      • 1...Kxb2!
    • 1.Kb6?
      • 1...Kxb2
        • 2.Qxb3#
      • 1...Kxd2
        • 2.Qf2#
      • 1...cxd2
        • 2.Be5#
      • 1...cxb2!
    • 1.Kd6?
      • 1...Kxb2
        • 2.Qxb3#
      • 1...Kxd2
        • 2.Qf2#
      • 1...cxb2
        • 2.Ba5#
      • 1...cxd2!
    • 1.Sa4?
      • 1...Kxd2
        • 2.Qf2#
      • 1...cxd2
        • 2.Qc4#
      • 1...b2!
    • 1.Sxb3?
      • 1...cxb2
        • 2.Qc4#
      • 1...Kxb2!
    • 1.Sf3?
      • 1...cxb2
        • 2.Qc4#
      • 1...Kxb2!
    • 1.Ba5?
      • 1...Kxb2
        • 2.Qxb3#
      • 1...Kxd2
        • 2.Qf2#
      • 1...cxb2
        • 2.Kd5#
        • 2.Kb6#
        • 2.Kd6#
        • 2.Kb7#
        • 2.Qxb3#
        • 2.Qc4#
      • 1...cxd2!
    • 1.Be5?
      • 1...Kxb2
        • 2.Qxb3#
      • 1...Kxd2
        • 2.Qf2#
      • 1...cxd2
        • 2.Kb5#
        • 2.Kd5#
        • 2.Kb6#
        • 2.Kd6#
        • 2.Kb7#
        • 2.Qc4#
      • 1...cxb2!
    • 1.Rd1?
      • threat
        • 2.Qxb3#
      • 1...Kxb2
        • 2.Qxb3#
      • 1...cxd2!
    • 1.Rb8?
      • 1...Kxb2
        • 2.Qxb3#
      • 1...Kxd2
        • 2.Qf2#
      • 1...cxd2
        • 2.Qxb3#
      • 1...cxb2!
    • 1.Qc4?
      • 1...Kxb2
        • 2.Qxb3#
      • 1...Kxd2!
    • 1.Qf2?
      • threat
        • 2.Sb1#
        • 2.Sf3#
        • 2.Sdc4#
      • 1...Kxb2
        • 2.Sc4#
      • 1...cxb2
        • 2.Sb1#
      • 1...cxd2!
  • Keys
    • 1.Kb7!
      • 1...Kxb2
        • 2.Qxb3#
      • 1...Kxd2
        • 2.Qf2#
      • 1...cxb2
        • 2.Ba5#
      • 1...cxd2
        • 2.Be5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,XS(B)::QAR1(K),XP(b)
    • K(a);OGATEB,P-FLIGHT,XS(C)::QAR2(K)
  • Tries
    • Try
      • K(H);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT,XS(B)::QAR1(K),XP(b)
        • K(a);OGATEB,P-FLIGHT,XS(C)::QAR2(K)
        • P(c);OGATEB,SBLOCK,XS(C)::R(L)+B(I)
      • Refutation
        • P(c);XS(B)
    • Try
      • K(H);S_FLIGHT
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(C)::QAR2(K)
        • P(c);OGATEB,SBLOCK,XS(B)::R(L)+B(I)
        • P(c);OGATEB,SBLOCK,XS(C)::R(L)+B(I)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
    • Try
      • K(H);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT,XS(B)::QAR1(K),XP(b)
        • K(a);OGATEB,P-FLIGHT,XS(C)::QAR2(K)
        • P(c);OGATEB,SBLOCK,XS(C)::R(L)+B(I)
      • Refutation
        • P(c);XS(B)
    • Try
      • K(H);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT,XS(B)::QAR1(K),XP(b)
        • K(a);OGATEB,P-FLIGHT,XS(C)::QAR2(K)
        • P(c);OGATEB,SBLOCK,XS(B)::R(L)+B(I)
      • Refutation
        • P(c);XS(C)
    • Try
      • S(B);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(C)::QAR2(K)
        • P(c);OGATEB,SBLOCK,XS(C)::QAR2(K)
      • Refutation
        • P(b);
    • Try
      • S(C);XP(b)
      • Vars
        • P(c);OGATEB,SBLOCK,XS(B)::QAR2(K)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
    • Try
      • S(C);
      • Vars
        • P(c);OGATEB,SBLOCK,XS(B)::QAR2(K)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
    • Try
      • B(I);
      • Vars
        • K(a);P-FLIGHT,XS(B)::QAR1(K),XP(b)
        • K(a);OGATEB,P-FLIGHT,P_SPINP(c),XS(C)::QAR2(K)
      • Refutation
        • P(c);XS(C)
    • Try
      • B(I);
      • Vars
        • K(a);P-FLIGHT,P_SPINP(c),XS(B)::QAR1(K),XP(b)
        • K(a);OGATEB,P-FLIGHT,XS(C)::QAR2(K)
      • Refutation
        • P(c);XS(B)
    • Try
      • R(A);
      • Threat
        • QAB1(K),XP(b)
      • Vars
        • K(a);P-FLIGHT,XS(B)::QAR1(K),XP(b)
      • Refutation
        • P(c);XS(C)
    • Try
      • R(L);
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b),XS(B)::QAR1(K),XP(b)
        • K(a);OGATEB,P-FLIGHT,XS(C)::QAR2(K)
        • P(c);SBLOCK,XS(C)::QAB1(K),XP(b)
      • Refutation
        • P(c);XS(B)
    • Try
      • Q(K);P_PINP(c)
      • Vars
        • K(a);N_SPINP(c),P-FLIGHT,XS(B)::QAR1(K),XP(b)
      • Refutation
        • K(a);N_SPINP(c),P-FLIGHT,XS(C)
    • Try
      • Q(K);
      • Threat
        • DUALS(3)
      • Vars
        • K(a);P-FLIGHT,XS(B)::QAR(K)+S(C),DCHECK
        • P(c);SBLOCK,XS(B)::QAR(K)+S(C)
      • Refutation
        • P(c);P_SPINP(c),XS(C)
  • Actual
    • K(H);S_FLIGHT
    • Vars
      • K(a);P-FLIGHT,XS(B)::QAR1(K),XP(b)
      • K(a);OGATEB,P-FLIGHT,XS(C)::QAR2(K)
      • P(c);OGATEB,SBLOCK,XS(B)::R(L)+B(I)
      • P(c);OGATEB,SBLOCK,XS(C)::R(L)+B(I)
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