MESON Chess Problem Database

Problem Display
PID: 207172 (n1r4b/3B4/3P3R/RNPk1p2/2r2P2/3P4/2P5/6QK w - - 0 1)

Michel, Francois

Il Problema, 1962

n1r4b/3B4/3P3R/RNPk1p2/2r2P2/3P4/2P5/6QK

#2

11 + 6

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Sc3#
    • 1...R4xc5
      • 2.Qg2#
    • 1...R8xc5
      • 2.Qg8#
    • 1...Rc6
      • 2.Be6#
  • Tries
    • 1.Sa7?
      • threat
        • 2.Be6#
      • 1...Rxf4
        • 2.c6#
      • 1...R4xc5
        • 2.c4#
      • 1...R8xc5
        • 2.Bc6#
      • 1...Re4
        • 2.c6#
      • 1...Re8
        • 2.Bc6#
      • 1...Sc7
        • 2.Bc6#
      • 1...Bf6!
    • 1.Qd4+?
      • 1...Rxd4
        • 2.Sc3#
      • 1...Bxd4!
    • 1.c6?
      • threat
        • 2.Sc3#
        • 2.Sc7#
      • 1...Rc3
        • 2.Sxc3#
        • 2.Sc7#
      • 1...Rc5
        • 2.Qg2#
      • 1...Rc7
        • 2.Sc3#
        • 2.Sxc7#
      • 1...Bc3
        • 2.Sxc3#
        • 2.Sc7#
      • 1...Sc7
        • 2.Sc3#
        • 2.Sxc7#
      • 1...Bf6!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Be6#
      • 1...Rxd4
        • 2.c6#
      • 1...R4xc5
        • 2.c4#
      • 1...R8xc5
        • 2.Bc6#
      • 1...Bxd4
        • 2.Qg2#
      • 1...Re8
        • 2.Bc6#
      • 1...Sc7
        • 2.Bc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(a);N_GUARD,S_CUTB(f)::S(G)
    • R(a);N_GUARD,SBLOCK,XP(H)::QAB(A)
    • R(e);N_GUARD,SBLOCK,XP(H)::QAB(A)
    • R(e);SBLOCK::B(K)
  • Tries
    • Try
      • S(G);
      • Threat
        • B(K)
      • Vars
        • R(a);N_GUARD,XP(E)::R(F)+P(H)
        • R(a);OGATE,P_SPINR(a),XP(H)::P(C)
        • R(e);N_GUARD,P_SPINR(e),XP(H)::B(K)
        • R(a);N_GUARD::R(F)+P(H)
        • R(e);N_GUARD::B(K)
        • S(d);S_CUTR(e)::B(K)
      • Refutation
        • B(f);
    • Try
      • Q(A);CHECK
      • Vars
        • R(a);SBLOCK,XQ(A)::S(G)
      • Refutation
        • B(f);XQ(A)
    • Try
      • P(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);N_GUARD,SBLOCK::QAB(A)
      • Refutation
        • B(f);
  • Actual
    • S(G);
    • Threat
      • B(K)
    • Vars
      • R(a);N_GUARD,XS(G)::R(F)+P(H)
      • R(a);OGATE,P_SPINR(a),XP(H)::P(C)
      • R(e);N_GUARD,P_SPINR(e),XP(H)::B(K)
      • B(f);SBLOCK,XS(G)::QAB(A)
      • R(e);N_GUARD::B(K)
      • S(d);S_CUTR(e)::B(K)
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