MESON Chess Problem Database

Problem Display
PID: 139228 (6bb/1pN2k1p/7P/3nR3/5P1N/QK1p4/B7/5R2 w - - 0 1)

Perier, Bernard

Comedia, 1936

6bb/1pN2k1p/7P/3nR3/5P1N/QK1p4/B7/5R2

#2

9 + 7

6490 yacpdb 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Rf5#
    • 1...Sc3
      • 2.Qe7#
    • 1...Se3
      • 2.Qe7#
    • 1...Sxf4
      • 2.Qe7#
    • 1...Sb6
      • 2.Qe7#
    • 1...Sf6
      • 2.Qe7#
    • 1...Sxc7
      • 2.Qe7#
    • 1...Se7
      • 2.Qxe7#
  • Tries
    • 1.Ka4?
      • threat
        • 2.Qe7#
      • 1...Kf6
        • 2.Rf5#
      • 1...Bxe5
        • 2.fxe5#
      • 1...Bf6
        • 2.Bxd5#
      • 1...b5+!
    • 1.Rf5+?
      • 1...Sf6
        • 2.Kb2#
        • 2.Kc3#
        • 2.Ka4#
      • 1...Bf6!
  • Keys
    • 1.Kb2!
      • threat
        • 2.Qe7#
      • 1...Bxe5+
        • 2.fxe5#
      • 1...Kf6
        • 2.Rf5#
      • 1...Bf6
        • 2.Bxd5#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • K(d);P-FLIGHT::R1(G)
    • S(b);N_GUARD::QAR1(C)
    • S(b);N_GUARD,P_SPINS(b),XP(E)::QAR1(C)
    • S(b);N_GUARD,XS(I)::QAR1(C)
    • S(b);N_GUARD::QAR1(C),XS(b)
  • Tries
    • Try
      • K(D);P_PINS(b),S_FLIGHT
      • Threat
        • QAR1(C)
      • Vars
        • K(d);N_SPINS(b),P-FLIGHT::R1(G)
        • B(g);OGATE,XR(G)::R(A)+P(E),XB(g)
        • B(g);SBLOCK::B(B),XS(b)
      • Refutation
        • P(c);CHECK
    • Try
      • R(G);CHECK
      • Refutation
        • B(g);P_SPINB(g)
  • Actual
    • K(D);P-FLIGHT,P_PINS(b),P_SPINR(G)
    • Threat
      • QAR1(C)
    • Vars
      • B(g);CHECK,OGATE,XR(G)::R(A)+P(E),XB(g)
      • K(d);N_PINR(G),N_SPINS(b),P-FLIGHT::R1(G)
      • B(g);SBLOCK::B(B),XS(b)
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