MESON Chess Problem Database

Problem Display
PID: 101670 (3nK3/1p1Q1n2/3PN3/RPBk4/3p1P2/2pP1R1p/q7/1r5B w - - 0 1)

Robert, Philippe

diagrammes, 2002

3nK3/1p1Q1n2/3PN3/RPBk4/3p1P2/2pP1R1p/q7/1r5B

#2

11 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb3
      • 2.Rf1#
    • 1...Qc4
      • 2.Rf1#
    • 1...Qa1
      • 2.Rf1#
    • 1...Qa3
      • 2.Rf1#
    • 1...Qa4
      • 2.Rf1#
    • 1...Qxa5
      • 2.Rf1#
    • 1...Rb2
      • 2.Rf2#
    • 1...Rb3
      • 2.Rf2#
    • 1...Rb4
      • 2.Rf2#
    • 1...Rxb5
      • 2.Rf2#
    • 1...Sxd6+
      • 2.Qxd6#
    • 1...c2
      • 2.Rf1#
  • Tries
    • 1.Ba3?
      • threat
        • 2.Sc7#
      • 1...Sxd6+
        • 2.Qxd6#
      • 1...Qxa3
        • 2.Rf1#
      • 1...Sxe6
        • 2.Qxb7#
      • 1...Qc4
        • 2.Rf1#
      • 1...Re1
        • 2.b6#
      • 1...Rb4
        • 2.Rf2#
      • 1...Qe2!
    • 1.Bb4?
      • threat
        • 2.Sc7#
      • 1...Sxd6+
        • 2.Qxd6#
      • 1...Qxa5
        • 2.Rf1#
      • 1...Rxb4
        • 2.Rf2#
      • 1...Sxe6
        • 2.Qxb7#
      • 1...Qc4
        • 2.Rf1#
      • 1...Qe2
        • 2.b6#
      • 1...Re1!
    • 1.Rxh3+?
      • 1...Qg2
        • 2.Bxg2#
      • 1...Rxh1!
  • Keys
    • 1.b6!
      • threat
        • 2.Sc7#
      • 1...Sxd6+
        • 2.Qxd6#
      • 1...Qxa5
        • 2.Rf1#
      • 1...Sxe6
        • 2.Qxb7#
      • 1...Qe2
        • 2.Bb4#
      • 1...Re1
        • 2.Ba3#
      • 1...Rb5
        • 2.Rf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • Q(b);N_GUARD::B(A)+R(C)
    • Q(b);N_GUARD,XR(E)::B(A)+R(C)
    • R(a);N_GUARD::B(A)+R(C)
    • R(a);N_GUARD,XP(F)::B(A)+R(C)
    • S(h);CHECK,OGATE,P_SPINS(h),XP(H)::QAR1(J),XS(h)
    • P(c);S_CUTQ(b)::B(A)+R(C)
  • Tries
    • Try
      • B(G);
      • Threat
        • S(I)
      • Vars
        • S(h);CHECK,OGATE,P_SPINS(h),XP(H)::QAR1(J),XS(h)
        • Q(b);N_GUARD,XB(G)::B(A)+R(C)
        • S(i);N_GUARD,SBLOCK,XS(I)::QAB(J),XP(g)
        • Q(b);N_GUARD::B(A)+R(C)
        • R(a);N_GUARD,P_PINS(I)::R(E)+P(F)
        • R(a);N_GUARD::B(A)+R(C)
      • Refutation
        • Q(b);P_PINS(I)
    • Try
      • B(G);
      • Threat
        • S(I)
      • Vars
        • S(h);CHECK,OGATE,P_SPINS(h),XP(H)::QAR1(J),XS(h)
        • Q(b);N_GUARD,XR(E)::B(A)+R(C)
        • R(a);N_GUARD,XB(G)::B(A)+R(C)
        • S(i);N_GUARD,SBLOCK,XS(I)::QAB(J),XP(g)
        • Q(b);N_GUARD::B(A)+R(C)
        • Q(b);N_GUARD,P_PINS(I)::R(E)+P(F)
      • Refutation
        • R(a);P_PINS(I)
    • Try
      • R(C);CHECK,XP(d)
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::B(A),XQ(b)
      • Refutation
        • R(a);XB(A)
  • Actual
    • P(F);
    • Threat
      • S(I)
    • Vars
      • S(h);CHECK,OGATE,P_SPINS(h),XP(H)::QAR1(J),XS(h)
      • Q(b);N_GUARD,XR(E)::B(A)+R(C)
      • S(i);N_GUARD,SBLOCK,XS(I)::QAB(J),XP(g)
      • Q(b);N_GUARD,P_PINS(I)::R(E)+B(G)
      • R(a);N_GUARD,P_PINS(I)::R(E)+B(G)
      • R(a);N_GUARD::B(A)+R(C)
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