MESON Chess Problem Database

Problem Display
PID: 15709 (6b1/Q6B/8/B1p2Nn1/2p2p2/p2n2Rr/2k2r2/KR6 w - - 0 1)

Cheylan, Yves

1st Prize, Hassberg MT, 1987-1988

6b1/Q6B/8/B1p2Nn1/2p2p2/p2n2Rr/2k2r2/KR6

#2

7 + 10

3297 FIDE Album (1986-1988) 1995
145 StrateGems 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Se3#
    • 1...Se1
      • 2.Se3#
      • 2.Sd4#
    • 1...Sb2
      • 2.Sd4#
    • 1...Se5
      • 2.Se3#
      • 2.Sd4#
    • 1...fxg3
      • 2.Se3#
    • 1...f3
      • 2.Se3#
  • Tries
    • 1.Qxc5?
      • threat
        • 2.Sd4#
      • 1...Sc1
        • 2.Se3#
      • 1...Sb4
        • 2.Qxf2#
      • 1...c3
        • 2.Qxc3#
      • 1...Se6
        • 2.Qxc4#
      • 1...Sf3!
    • 1.Qg7?
      • threat
        • 2.Qc3#
      • 1...Sc1
        • 2.Se3#
      • 1...c3
        • 2.Qxc3#
      • 1...Se5
        • 2.Se3#
        • 2.Sd4#
      • 1...Se4!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qa4#
      • 1...c3
        • 2.Qxd3#
      • 1...Sc1
        • 2.Se3#
      • 1...Sb2
        • 2.Sd4#
      • 1...Sb4
        • 2.Qd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(d);::B(G)+S(E),DCHECK
    • P(g);N_GUARD,XR(C)::S(E)
    • P(g);N_GUARD::S(E)
  • Tries
    • Try
      • Q(F);P_PINP(f),XP(h)
      • Threat
        • S(E)
      • Vars
        • S(d);::B(G)+S(E),DCHECK
        • S(d);N_GUARD::QAR(F),XR(b)
        • P(f);OGATE::QAR1(F),XP(f)
        • S(i);S_CUTB(j)::QAR2(F),XP(f)
      • Refutation
        • S(i);
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • S(d);::B(G)+S(E),DCHECK
        • P(f);::QAR1(F),XP(f)
      • Refutation
        • S(i);
  • Actual
    • Q(F);
    • Threat
      • QAB(F)
    • Vars
      • P(f);N_GUARD::QAB1(F),XS(d)
      • S(d);::B(G)+S(E),DCHECK
      • S(d);OGATE::QAB1(F)
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