MESON Chess Problem Database

Problem Display
PID: 52820 (4BRr1/4Qp1n/8/3p2br/1q1n3p/2NN1k1K/8/6B1 w - - 0 1)

Maleika, Gerhard

Die Schwalbe, 2004

4BRr1/4Qp1n/8/3p2br/1q1n3p/2NN1k1K/8/6B1

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Be3
      • 2.Qxe3#
    • 1...Bf4
      • 2.Se1#
    • 1...Bf6
      • 2.Qe3#
    • 1...Sc2
      • 2.Qe2#
    • 1...Se2
      • 2.Qxe2#
    • 1...Sb3
      • 2.Qe2#
    • 1...Sb5
      • 2.Qe2#
    • 1...Sf5
      • 2.Qe2#
    • 1...Sc6
      • 2.Qe2#
    • 1...f5
      • 2.Bxh5#
    • 1...f6
      • 2.Bxh5#
  • Tries
    • 1.Rxf7+?
      • 1...Bf4
        • 2.Se1#
        • 2.Rxf4#
        • 2.Qe3#
      • 1...Bf6
        • 2.Qe3#
      • 1...Sf5
        • 2.Qe2#
      • 1...Sf6!
  • Keys
    • 1.Bxf7!
      • threat
        • 2.Bxd5#
        • 2.Bxh5#
      • 1...Rh6
        • 2.Bxd5#
        • 2.Bh5#
      • 1...Rg6
        • 2.Bxd5#
      • 1...Bf4
        • 2.Se1#
      • 1...Bf6
        • 2.Qe3#
      • 1...Sf5
        • 2.Qe2#
      • 1...Se6
        • 2.Bxh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • B(f);N_GUARD::QAR1(E),XB(f)
    • B(f);N_SPINP(h),SBLOCK::S(C)
    • B(f);N_GUARD,N_SPINP(h)::QAR1(E)
    • S(c);N_GUARD::QAB1(E)
    • S(c);N_GUARD::QAB1(E),XS(c)
    • S(c);N_GUARD,N_SPINP(h)::QAB1(E)
    • P(h);OGATE::B(F),XR(g)
  • Tries
    • Try
      • R(G);CHECK,XP(h)
      • Vars
        • B(f);P_SPINB(f)::QAR1(E)
        • S(c);P_SPINS(c)::QAB1(E)
      • Refutation
        • S(i);P_SPINS(i)
  • Actual
    • B(F);XP(h)
    • Threat
      • DUALS(2)
    • Vars
      • R(j);::R(G)+B(F),DCHECK,XP(e)
      • B(f);SBLOCK::S(C)
      • B(f);N_GUARD::QAR1(E)
      • S(c);N_GUARD::QAB1(E)
      • S(c);::R(G)+B(F),DCHECK,XR(g)
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