MESON Chess Problem Database

Problem Display
PID: 271329 (N7/3R1N2/5p2/1p1P2p1/pnkp1nR1/Q4K2/2P2B2/8 w - - 0 1)

Roche, Jean

3rd Prize, Buletin Problemistic, 1995

N7/3R1N2/5p2/1p1P2p1/pnkp1nR1/Q4K2/2P2B2/8

#2

9 + 8

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qc3#
    • 1...Sa2
      • 2.Sb6#
    • 1...Sxc2
      • 2.Sb6#
    • 1...Sbd3
      • 2.Sb6#
    • 1...Sbxd5
      • 2.Sd6#
    • 1...Sa6
      • 2.Sb6#
    • 1...Sc6
      • 2.Sb6#
    • 1...d3
      • 2.Sb6#
  • Tries
    • 1.Se5+?
      • 1...Kc5
        • 2.Qc3#
      • 1...fxe5!
    • 1.Be1?
      • threat
        • 2.Qxb4#
      • 1...Kc5
        • 2.Qxb4#
      • 1...Sxc2
        • 2.Sb6#
      • 1...Sbxd5
        • 2.Sd6#
      • 1...Sa2
        • 2.Sb6#
      • 1...Sbd3
        • 2.Sb6#
      • 1...Sa6
        • 2.Sb6#
      • 1...Sc6
        • 2.Sb6#
      • 1...Sfd3
        • 2.Qc3#
      • 1...Sfxd5!
    • 1.Rc7+?
      • 1...Sc6
        • 2.Sb6#
      • 1...Kxd5!
    • 1.Qb3+?
      • 1...Kc5
        • 2.Qc3#
      • 1...axb3!
    • 1.Qc3+?
      • 1...dxc3
        • 2.Sb6#
      • 1...Kxc3!
  • Keys
    • 1.Bxd4!
      • threat
        • 2.Qc3#
      • 1...Kxd4
        • 2.Qxb4#
      • 1...Sbxd5
        • 2.Qc5#
      • 1...Sfxd5
        • 2.Sd6#
      • 1...Sa2
        • 2.Qc5#
      • 1...Se2
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • K(c);N_GUARD,P-FLIGHT,P_SPINP(d),P_SPINS(b)::QAR2(C)
    • S(b);::S(I)
    • S(b);XP(A)::S(I)
    • S(b);SBLOCK,XP(F)::S(H)
    • P(d);P_SPINS(e)::S(I)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(c);N_GUARD,P-FLIGHT,P_SPINP(d),P_SPINS(b)::QAR2(C)
      • Refutation
        • P(h);XS(H)
    • Try
      • B(B);
      • Threat
        • QAR1(C),XS(b)
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::QAB1(C),XS(b)
        • S(b);XP(A)::S(I)
        • S(b);SBLOCK,XP(F)::S(H)
        • S(b);::S(I)
        • S(e);P_SPINP(d)::QAR1(C)
      • Refutation
        • S(e);P_SPINP(d),XP(F)
    • Try
      • R(G);CHECK
      • Vars
        • S(b);P_SPINS(b)::S(I)
      • Refutation
        • K(c);S_FLIGHT,XP(F)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);N_GUARD,P-FLIGHT,P_SPINP(d)::QAR2(C)
      • Refutation
        • P(a);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • P(d);P_SPINS(e),SBLOCK,XQ(C)::S(I)
      • Refutation
        • K(c);P-FLIGHT,XQ(C)
  • Actual
    • B(B);XP(d)
    • Threat
      • QAR1(C)
    • Vars
      • K(c);N_GUARD,P-FLIGHT,P_SPINS(e),XB(B)::QAR2(C),XS(b)
      • S(b);OGATE,XP(F)::QAR1(C)
      • S(e);SBLOCK,XP(F)::S(H)
      • S(b);OGATE::QAR1(C)
      • S(e);::S(I)
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