MESON Chess Problem Database

Problem Display
PID: 177432 (5B2/2p5/RN2P3/3qkpp1/RN2P3/1pPpQ3/3K4/8 w - - 0 1)

Bosma, Rinke

Probleemblad, 1978

5B2/2p5/RN2P3/3qkpp1/RN2P3/1pPpQ3/3K4/8

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Sd7#
    • 1...Qxe4
      • 2.Sd7#
    • 1...Qb7
      • 2.Sd7#
    • 1...Qa8
      • 2.Sd7#
    • 1...Qa5
      • 2.Sd7#
    • 1...Qc5
      • 2.Sd7#
    • 1...Qd7
      • 2.Sxd7#
  • Tries
    • 1.Sc4+?
      • 1...Qxc4
        • 2.Bg7#
      • 1...Kf6!
    • 1.S6xd5?
      • threat
        • 2.Sxd3#
        • 2.Bg7#
        • 2.Qd4#
      • 1...fxe4
        • 2.Qxg5#
      • 1...c5
        • 2.Sxd3#
        • 2.Bg7#
      • 1...c6!
    • 1.Bg7+?
      • 1...Kd6
        • 2.Sc8#
      • 1...Kxe6!
  • Keys
    • 1.Qxg5!
      • threat
        • 2.Qxf5#
      • 1...Kxe4
        • 2.Qe3#
      • 1...Kxe6
        • 2.Qe7#
      • 1...Qxe4
        • 2.Sd7#
      • 1...Qxe6
        • 2.Sxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • Q(c);N_GUARD::S(H)
    • Q(c);N_GUARD,P_SPINQ(c),XP(F)::S(H)
    • Q(c);N_GUARD::S(H),XQ(c)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • Q(c);XS(H)::B(J)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • S(H);XQ(c)
      • Threat
        • DUALS(3)
      • Vars
        • P(e);OGATEB,P_SPINP(e),SBLOCK,XP(F)::QAR2(C),XP(f)
      • Refutation
        • P(g);
    • Try
      • B(J);CHECK
      • Vars
        • K(d);S_FLIGHT::R(G)+S(H),DCHECK
      • Refutation
        • K(d);P-FLIGHT,XP(I)
  • Actual
    • Q(C);P_PINP(e),XP(f)
    • Threat
      • QAR1(C),XP(e)
    • Vars
      • K(d);N_SPINP(e),OGATEB,P-FLIGHT,XP(F)::QAR1(C)
      • K(d);N_SPINP(e),OGATEB,P-FLIGHT,XP(I)::QAR1(C)
      • Q(c);N_GUARD,SBLOCK,XP(F)::S(H)
      • Q(c);N_GUARD,SBLOCK,XP(I)::S(E),XP(b)
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