MESON Chess Problem Database

Problem Display
PID: 210738 (1B6/1N1p3P/1QpR4/4kpn1/2r1P2q/p1PbrRnB/KNP5/8 w - - 0 1)

Ouellet, Charles

The Problemist, 1985

1B6/1N1p3P/1QpR4/4kpn1/2r1P2q/p1PbrRnB/KNP5/8

#2

12 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qxe3#
    • 1...Qxe4
      • 2.h8Q#
      • 2.h8B#
    • 1...Rexe4
      • 2.Sxd3#
    • 1...Rxc3
      • 2.Qd4#
    • 1...Rd4
      • 2.Qxd4#
    • 1...Rcxe4
      • 2.Qc5#
    • 1...Bxe4
      • 2.Sxc4#
    • 1...S3xe4
      • 2.Rxf5#
    • 1...fxe4
      • 2.Rxd7#
    • 1...f4
      • 2.Re6#
    • 1...c5
      • 2.Re6#
  • Tries
    • 1.Sxd3+?
      • 1...Kxe4
        • 2.Rxe3#
        • 2.Qxe3#
      • 1...Rxd3!
    • 1.Sxc4+?
      • 1...Kxe4
        • 2.Qxe3#
      • 1...Bxc4+!
    • 1.Qc5+?
      • 1...Kxe4
        • 2.Qxe3#
      • 1...Rxc5!
    • 1.h8Q+?
      • 1...Kxe4
        • 2.Qxe3#
      • 1...Qxh8!
    • 1.h8B+?
      • 1...Kxe4
        • 2.Qxe3#
      • 1...Qxh8!
  • Keys
    • 1.Sd8!
      • threat
        • 2.Re6#
      • 1...Kxe4
        • 2.Qxe3#
      • 1...Qxe4
        • 2.h8Q#
        • 2.h8B#
      • 1...Rexe4
        • 2.Sxd3#
      • 1...Rcxe4
        • 2.Qc5#
      • 1...Bxe4
        • 2.Sxc4#
      • 1...S3xe4
        • 2.Rxf5#
      • 1...S5xe4
        • 2.Sf7#
      • 1...fxe4
        • 2.Rxd7#
      • 1...Se6
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • K(g);OGATEB,P-FLIGHT,XP(G)::QAR1(H),XR(c)
    • Q(f);N_GUARD,SBLOCK,XP(G)::P=Q
    • R(c);N_GUARD,SBLOCK,XP(G)::S(B),XB(b)
    • R(e);N_GUARD,XP(D)::QAB1(H)
    • R(e);N_GUARD::QAB1(H),XR(e)
    • R(e);N_GUARD,SBLOCK,XP(G)::QAR2(H)
    • B(b);N_GUARD,SBLOCK,XP(G)::S(B),XR(e)
    • S(d);N_GUARD,SBLOCK,XP(G)::R1(E),XP(h)
    • P(h);SBLOCK,XP(G)::B(L)+R(I),XP(k)
    • P(h);::B(L)+R(I),DCHECK
    • P(j);::B(L)+R(I),DCHECK
  • Tries
    • Try
      • S(B);CHECK,XB(b)
      • Refutation
        • R(c);XS(B)
    • Try
      • S(B);CHECK,XR(e)
      • Vars
        • K(g);P-FLIGHT,XP(G)::QAR1(H),XR(c)
      • Refutation
        • B(b);CHECK,XS(B)
    • Try
      • Q(H);CHECK
      • Vars
        • K(g);OGATEB,P-FLIGHT,XP(G)::QAR1(H),XR(c)
      • Refutation
        • R(e);XQ(H)
    • Try
      • P(K);CHECK
      • Vars
        • K(g);P-FLIGHT,XP(G)::QAR1(H),XR(c)
      • Refutation
        • Q(f);XQ(K)
    • Try
      • P(K);CHECK
      • Vars
        • K(g);P-FLIGHT,XP(G)::QAR1(H),XR(c)
      • Refutation
        • Q(f);XB(K)
  • Actual
    • S(J);
    • Threat
      • B(L)+R(I),DCHECK
    • Vars
      • K(g);OGATEB,P-FLIGHT,XP(G)::QAR1(H),XR(c)
      • Q(f);N_GUARD,SBLOCK,XP(G)::P=Q
      • R(c);N_GUARD,SBLOCK,XP(G)::S(B),XB(b)
      • R(e);N_GUARD,SBLOCK,XP(G)::QAR2(H)
      • B(b);N_GUARD,SBLOCK,XP(G)::S(B),XR(e)
      • S(d);N_GUARD,SBLOCK,XP(G)::R1(E),XP(h)
      • S(i);N_GUARD,SBLOCK,XP(G)::S(J)
      • P(h);SBLOCK,XP(G)::B(L)+R(I),XP(k)
      • S(i);::B(L)+R(I),DCHECK,XS(i)
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