MESON Chess Problem Database

Problem Display
PID: 161183 (5B2/4N3/B1n1R3/1qrPP2K/3kp3/2p5/2p2P2/2N1RQ2 w - - 0 1)

Grolus, Johan

Sp. Belgian Mention, Fontaine MT, 1978-1979

5B2/4N3/B1n1R3/1qrPP2K/3kp3/2p5/2p2P2/2N1RQ2

#2

11 + 7

15611 Schaak-composities 1975-1979 (de Vuyst) 1982
5110 Bekroonde Problemen 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf1
      • 2.Sb3#
    • 1...Qe2+
      • 2.Sxe2#
    • 1...Qd3
      • 2.Sb3#
    • 1...Qa4
      • 2.Se2#
    • 1...Qxa6
      • 2.Sb3#
    • 1...Qb1
      • 2.Se2#
    • 1...Qb2
      • 2.Se2#
    • 1...Qb3
      • 2.Se2#
      • 2.Sxb3#
    • 1...Qb4
      • 2.Se2#
    • 1...Qa5
      • 2.Se2#
      • 2.Sb3#
    • 1...Qb6
      • 2.Se2#
    • 1...Qb7
      • 2.Se2#
    • 1...Qb8
      • 2.Se2#
    • 1...Rxd5
      • 2.Sf5#
    • 1...Sb4
      • 2.Sb3#
  • Tries
    • 1.Qd3+?
      • 1...Qxd3
        • 2.Sb3#
      • 1...exd3!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qxe4#
      • 1...Qxe2+
        • 2.Sxe2#
      • 1...Rxd5
        • 2.Sf5#
      • 1...Rc4
        • 2.Qe3#
      • 1...e3
        • 2.Qg4#
      • 1...Qd3
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • Q(e);N_GUARD,XQ(C)::S(A)
    • Q(e);CHECK,N_GUARD::S(A),XQ(e)
    • Q(e);N_GUARD::S(A)
    • Q(e);N_GUARD,XB(H)::S(A)
    • R(f);P_PINP(F),SBLOCK,XP(E)::S(J)
    • S(g);S_CUTQ(e)::S(A)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • Q(e);XQ(C)::S(A)
      • Refutation
        • P(d);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C),XP(d)
    • Vars
      • Q(e);CHECK,XQ(C)::S(A),XQ(e)
      • R(f);P_PINP(F),SBLOCK,XP(E)::S(J)
      • R(f);SBLOCK::QAB1(C)
      • P(d);OGATEB::QAR(C)
      • Q(e);N_GUARD::S(A)
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