MESON Chess Problem Database

Problem Display
PID: 27438 (2R3B1/2N1Q3/1q3p2/4b3/2nkp3/3NR3/n1PP1PKB/8 w - - 0 1)

Segers, Marcel

3rd Prize, Il Problema, 1932

2R3B1/2N1Q3/1q3p2/4b3/2nkp3/3NR3/n1PP1PKB/8

#2

11 + 7

5085 The Macedonian Problemist 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Qxc5#
    • 1...Qa7
      • 2.Sb5#
    • 1...Qb1
      • 2.Qc5#
    • 1...Qb2
      • 2.Qc5#
    • 1...Qb3
      • 2.Qc5#
    • 1...Qb5
      • 2.Sxb5#
    • 1...Qa6
      • 2.Qc5#
    • 1...Qd6
      • 2.Sb5#
    • 1...Qe6
      • 2.Qc5#
    • 1...Qb7
      • 2.Qc5#
    • 1...Qb8
      • 2.Qc5#
    • 1...Bxh2
      • 2.Rxe4#
      • 2.Qxe4#
    • 1...Bg3
      • 2.Rxe4#
      • 2.Qxe4#
    • 1...Bf4
      • 2.Rxe4#
      • 2.Qxe4#
    • 1...Bd6
      • 2.Rxe4#
      • 2.Qxe4#
    • 1...Bxc7
      • 2.Rxe4#
      • 2.Qxe4#
    • 1...Sc1
      • 2.c3#
    • 1...Sb4
      • 2.c3#
    • 1...Sxe3+
      • 2.fxe3#
  • Tries
    • 1.Se6+?
      • 1...Qxe6
        • 2.Qc5#
      • 1...Kd5!
    • 1.Rd8+?
      • 1...Qd6
        • 2.Sb5#
      • 1...Bd6
        • 2.Rxe4#
        • 2.Qxe4#
      • 1...Sd6!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Se2#
      • 1...Sxe3+
        • 2.fxe3#
      • 1...Bxf4
        • 2.Rxe4#
      • 1...Qd6
        • 2.Sb5#
      • 1...Bd6
        • 2.Sfe6#
      • 1...Sd6
        • 2.Sce6#
      • 1...Sc1
        • 2.c3#
      • 1...Sc3
        • 2.dxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 11
  • Sets
    • Q(f);N_GUARD::QAB1(I),XQ(f)
    • Q(f);N_GUARD::S(H)
    • Q(f);N_GUARD::QAB1(I)
    • Q(f);N_GUARD::S(H),XQ(f)
    • S(a);N_GUARD::P(A)
    • S(b);CHECK,OGATE,XR(G)::P(C),XS(b)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • Q(f);XS(H)::QAB1(I)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • R(J);CHECK
      • Vars
        • Q(f);P_SPINQ(f)::S(H)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • S(b);CHECK,OGATE,XR(G)::P(C),XS(b)
      • B(e);XS(F)::R1(G),XP(d)
      • Q(f);N_GUARD::S(H)
      • B(e);S_CUTQ(f)::S(F)
      • S(b);S_CUTQ(f)::S(H)
      • S(a);N_GUARD::P(A)
      • S(a);OGATE::P(B),XS(a)
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