MESON Chess Problem Database

Problem Display
PID: 236550 (8/2B5/4P1b1/KPk2nNR/P1B3Q1/P1N1p3/1pn5/1qR5 w - - 0 1)

Heyl, Peter

Rochade Europa, 2005

8/2B5/4P1b1/KPk2nNR/P1B3Q1/P1N1p3/1pn5/1qR5

#2

12 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.axb4#
    • 1...Sd6
      • 2.Bb6#
  • Tries
    • 1.Sf7?
      • threat
        • 2.Bb6#
        • 2.Bd6#
      • 1...Bxh5
        • 2.Bb6#
      • 1...Bxf7
        • 2.Rxf5#
      • 1...Sd4!
    • 1.Ba2?
      • threat
        • 2.Qc4#
      • 1...Sxa3
        • 2.Qb4#
      • 1...Scd4
        • 2.Sce4#
      • 1...Sfd4
        • 2.Sge4#
      • 1...Sd6
        • 2.Bb6#
      • 1...Qxa2!
    • 1.Bd3?
      • threat
        • 2.Qc4#
      • 1...Sxa3
        • 2.Qb4#
      • 1...Scd4
        • 2.Sge4#
      • 1...Sfd4
        • 2.Sge4#
      • 1...Sd6
        • 2.Bb6#
      • 1...Qa2!
    • 1.Qe4?
      • threat
        • 2.Qd5#
      • 1...Sb4
        • 2.axb4#
      • 1...Se7!
  • Keys
    • 1.Bb3!
      • threat
        • 2.Qc4#
      • 1...Sxa3
        • 2.Qb4#
      • 1...Scd4
        • 2.Sce4#
      • 1...Sfd4
        • 2.Sge4#
      • 1...Sd6
        • 2.Bb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(c);OGATE::P(B),XS(c)
    • S(f);SBLOCK::B(L)
  • Tries
    • Try
      • S(I);P_PINS(f)
      • Threat
        • DUALS(2)
      • Vars
        • B(g);N_SPINS(f),XR(J)::B(L)
        • B(g);N_GUARD,XS(I)::R(J),XS(f)
      • Refutation
        • S(c);
    • Try
      • B(E);
      • Threat
        • QAR1(F)
      • Vars
        • S(c);N_GUARD,XP(B)::QAB1(F)
        • S(c);SBLOCK::R(A)+S(C),DCHECK
        • S(f);SBLOCK::R(J)+S(I),DCHECK
        • S(f);SBLOCK::B(L)
      • Refutation
        • Q(a);XB(E)
    • Try
      • B(E);
      • Threat
        • QAR1(F)
      • Vars
        • S(c);N_GUARD,XP(B)::QAB1(F)
        • S(c);SBLOCK::S(I)
        • S(f);SBLOCK::R(J)+S(I),DCHECK
        • S(f);SBLOCK::B(L)
      • Refutation
        • Q(a);
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • S(c);OGATE::P(B),XS(c)
      • Refutation
        • S(f);
  • Actual
    • B(E);
    • Threat
      • QAR1(F)
    • Vars
      • S(c);N_GUARD,XP(B)::QAB1(F)
      • S(c);SBLOCK::R(A)+S(C),DCHECK
      • S(f);SBLOCK::R(J)+S(I),DCHECK
      • S(f);SBLOCK::B(L)
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