MESON Chess Problem Database

Problem Display
PID: 121128 (5nK1/r2p2Np/p1pp3p/2nk4/pb3QR1/8/qB1r4/1bR5 w - - 0 1)

Schmitt, Olivier

Var Martin, 1990

5nK1/r2p2Np/p1pp3p/2nk4/pb3QR1/8/qB1r4/1bR5

#2

6 + 15

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Qxc4#
    • 1...Qa1
      • 2.Qc4#
    • 1...Qa3
      • 2.Qc4#
    • 1...Rxb2
      • 2.Qd4#
    • 1...Rc2
      • 2.Qd4#
      • 2.Qf5#
    • 1...Re2
      • 2.Qd4#
    • 1...Rf2
      • 2.Qd4#
    • 1...Rg2
      • 2.Qd4#
    • 1...Rh2
      • 2.Qd4#
    • 1...Rd3
      • 2.Qf5#
    • 1...Rd4
      • 2.Qxd4#
    • 1...Bd3
      • 2.Qd4#
    • 1...Bf5
      • 2.Qxf5#
    • 1...Sb3
      • 2.Qc4#
    • 1...Sd3
      • 2.Qf3#
      • 2.Qd4#
      • 2.Qe4#
    • 1...Se4
      • 2.Qf5#
  • Tries
    • 1.Rg5+?
      • 1...Bf5
        • 2.Rxf5#
        • 2.Qxf5#
      • 1...hxg5!
    • 1.Qg5+?
      • 1...Bf5
        • 2.Qxf5#
      • 1...hxg5!
    • 1.Qf3+?
      • 1...Se4
        • 2.Qf5#
      • 1...Be4!
  • Keys
    • 1.Se8!
      • threat
        • 2.Qxd6#
      • 1...Ke6
        • 2.Qf7#
      • 1...Sb3
        • 2.Qc4#
      • 1...Sd3
        • 2.Qe4#
      • 1...Se4
        • 2.Qf5#
      • 1...Sce6
        • 2.Sf6#
      • 1...Sb7
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 12
  • Sets
    • Q(b);N_GUARD::QAB1(C),XQ(b)
    • Q(b);N_GUARD::QAB1(C)
    • R(c);N_GUARD,XB(B)::QAR1(C)
    • R(c);N_GUARD::QAR1(C)
    • R(c);S_CUTB(a)::QAR2(C)
    • R(c);N_GUARD::QAR1(C),XR(c)
    • B(a);S_CUTR(c)::QAR1(C)
    • B(a);N_GUARD::QAR2(C),XB(a)
    • S(f);S_CUTQ(b)::QAB1(C)
    • S(f);S_CUTB(a)::QAR2(C)
  • Tries
    • Try
      • R(D);CHECK
      • Refutation
        • P(k);XR(D)
    • Try
      • Q(C);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR2(C),XB(a)
      • Refutation
        • P(k);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • S(f);P_SPINS(f),S_CUTB(a)::QAR2(C)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • S(E);
    • Threat
      • QAR1(C),XP(j)
    • Vars
      • K(g);S_FLIGHT::QAB1(C)
      • S(f);S_CUTQ(b)::QAB1(C)
      • S(f);N_GUARD,S_CUTB(a)::QAB1(C)
      • S(f);S_CUTB(a)::QAR2(C)
      • S(f);SBLOCK::S(E)
      • S(f);S_CUTR(l)::S(E)
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