MESON Chess Problem Database

Problem Display
PID: 238299 (3n1R2/3p1qpN/7p/R1pP1kB1/3PpN2/1B4Pb/K3Q3/8 w - - 0 1)

Segers, Marcel

1st Prize, Problemas, 1988

3n1R2/3p1qpN/7p/R1pP1kB1/3PpN2/1B4Pb/K3Q3/8

#2

11 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.g4#
    • 1...Bg2
      • 2.g4#
    • 1...Sc6
      • 2.Rxf7#
    • 1...Se6
      • 2.Rxf7#
    • 1...Sb7
      • 2.Rxf7#
    • 1...e3
      • 2.Bc2#
    • 1...cxd4
      • 2.d6#
    • 1...c4
      • 2.d6#
  • Tries
    • 1.Bc2?
      • threat
        • 2.Bxe4#
      • 1...Bg2
        • 2.g4#
      • 1...cxd4!
    • 1.Rxc5?
      • threat
        • 2.d6#
      • 1...e3
        • 2.Bc2#
      • 1...Sc6
        • 2.Rxf7#
      • 1...Se6
        • 2.Rxf7#
      • 1...Sb7
        • 2.Rxf7#
      • 1...d6!
    • 1.d6?
      • threat
        • 2.Rxc5#
      • 1...Sc6
        • 2.Rxf7#
      • 1...Se6
        • 2.Rxf7#
      • 1...Sb7
        • 2.Rxf7#
      • 1...e3!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qxh3#
      • 1...cxd4
        • 2.d6#
      • 1...hxg5
        • 2.Qxg5#
      • 1...e3
        • 2.Bc2#
      • 1...Bf1
        • 2.g4#
      • 1...Bg2
        • 2.g4#
      • 1...Bg4
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD::P(D)
    • S(i);N_GUARD::R(K),XQ(g)
    • P(b);OGATEB::B(C)
    • P(c);XP(E)::R(G)+P(H)
    • P(c);::R(G)+P(H)
  • Tries
    • Try
      • B(C);P_PINP(b),P_SPINP(H)
      • Threat
        • B(C),XP(b)
      • Vars
        • B(a);N_GUARD::P(D)
      • Refutation
        • P(c);XP(E)
    • Try
      • R(G);XP(c)
      • Threat
        • R(G)+P(H)
      • Vars
        • P(b);OGATEB::B(C)
        • S(i);N_GUARD::R(K),XQ(g)
      • Refutation
        • P(f);
    • Try
      • P(H);P_PINP(c),P_SPINB(C)
      • Threat
        • R(G),XP(c)
      • Vars
        • S(i);N_GUARD::R(K),XQ(g)
        • S(i);N_GUARD,N_PINB(C)::R(K),XQ(g)
      • Refutation
        • P(b);
  • Actual
    • Q(B);
    • Threat
      • QAB(B),XB(a)
    • Vars
      • P(c);XP(E)::R(G)+P(H)
      • P(e);OGATE,P_SPINP(e),XB(I)::QAR1(B),XP(e)
      • P(b);OGATEB::B(C)
      • B(a);N_GUARD::P(D)
      • B(a);SBLOCK::QAB1(B)
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