MESON Chess Problem Database

Problem Display
PID: 78903 (2N2n2/1Q5B/6r1/r2n2Rp/4k2K/qR2p3/1b2N1P1/8 w - - 0 1)

Commandeur, Henri

L'Echiquier de Paris, 1950

2N2n2/1Q5B/6r1/r2n2Rp/4k2K/qR2p3/1b2N1P1/8

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.Sxd6#
    • 1...Qa1
      • 2.Sd6#
    • 1...Qa2
      • 2.Sd6#
    • 1...Qa4
      • 2.Sd6#
    • 1...Ra4
      • 2.Qxd5#
    • 1...Rc5
      • 2.Sd6#
    • 1...Ra6
      • 2.Qxd5#
    • 1...Ra7
      • 2.Qxd5#
    • 1...Ra8
      • 2.Qxd5#
    • 1...Se6
      • 2.Bxg6#
    • 1...Sd7
      • 2.Bxg6#
  • Tries
    • 1.Sg3+?
      • 1...Kf4
        • 2.Rf5#
      • 1...Kd4!
    • 1.Rxa3?
      • threat
        • 2.Sd6#
      • 1...Rxa3
        • 2.Qxd5#
      • 1...Bxa3
        • 2.Qb1#
      • 1...Bc3
        • 2.Qb1#
      • 1...Ra6
        • 2.Qxd5#
      • 1...Be5
        • 2.Qb1#
      • 1...Sxh7!
    • 1.Qb4+?
      • 1...Bd4
        • 2.Sd6#
        • 2.Qxd4#
      • 1...Sxb4
        • 2.Sd6#
      • 1...Qxb4!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qf5#
      • 1...Sxd7
        • 2.Bxg6#
      • 1...Sc3
        • 2.Qd4#
      • 1...Sb4
        • 2.Sd6#
      • 1...Sf4
        • 2.Sg3#
      • 1...Sb6
        • 2.Qd3#
      • 1...Sf6
        • 2.Qd3#
      • 1...Sc7
        • 2.Qd3#
      • 1...Se7
        • 2.Qd3#
      • 1...Se6
        • 2.Bxg6#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 9
  • Sets
    • Q(b);N_GUARD::S(H),XQ(b)
    • Q(b);N_GUARD::S(H)
    • R(e);N_GUARD::QAB1(F),XS(f)
    • R(e);S_CUTQ(b)::S(H)
    • S(i);N_GUARD::B(G),XR(h)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(d);N_SPINR(h),N_SPINS(f),P-FLIGHT::R1(E)
      • Refutation
        • K(d);N_SPINR(h),N_SPINS(f),P-FLIGHT
    • Try
      • R(C);XQ(b)
      • Threat
        • S(H)
      • Vars
        • R(e);N_GUARD,XR(C)::QAB1(F),XS(f)
        • B(a);OGATE,XR(C)::QAB(F)
        • B(a);OGATE::QAB(F)
        • R(e);N_GUARD::QAB1(F),XS(f)
      • Refutation
        • S(i);N_SPINR(h),XB(G)
    • Try
      • Q(F);CHECK,N_PINS(f)
      • Vars
        • S(f);XQ(F)::S(H)
      • Refutation
        • Q(b);XQ(F)
  • Actual
    • Q(F);N_PINS(f)
    • Threat
      • QAB1(F)
    • Vars
      • S(i);N_GUARD,XQ(F)::B(G),XR(h)
      • S(f);OGATE::QAR1(F)
      • S(f);S_CUTQ(b)::S(H)
      • S(f);SBLOCK::S(A)
      • S(f);OGATE::QAB1(F)
      • S(i);N_GUARD::B(G),XR(h)
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