MESON Chess Problem Database

Problem Display
PID: 162740 (4Q2b/8/2p5/K2k2r1/R2BN3/1P3b2/B7/8 w - - 0 1)

Ernst, Manfred

Die Schwalbe, 2015

4Q2b/8/2p5/K2k2r1/R2BN3/1P3b2/B7/8

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Rg7
      • 2.Qe5#
    • 1...Bxe4
      • 2.Qd7#
    • 1...Bxd4
      • 2.b4#
  • Tries
    • 1.Qe7?
      • threat
        • 2.Sc3#
      • 1...Bxe4
        • 2.Qd7#
      • 1...Bxd4
        • 2.b4#
      • 1...c5!
  • Keys
    • 1.Be5!
      • threat
        • 2.Rd4#
      • 1...Rxe5
        • 2.Qd7#
      • 1...Bxe4
        • 2.b4#
      • 1...Bxe5
        • 2.Qf7#
      • 1...c5
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(c);N_GUARD,S_CUTB(e)::QAR1(G)
    • B(a);SBLOCK,XS(E)::QAR2(G)
    • B(e);SBLOCK,XB(D)::B(A)+P(B)
  • Tries
    • Try
      • Q(G);
      • Threat
        • S(E)
      • Vars
        • B(a);SBLOCK,XS(E)::QAR2(G)
        • B(e);SBLOCK,XB(D)::B(A)+P(B)
      • Refutation
        • P(d);
  • Actual
    • B(D);
    • Threat
      • R1(C)
    • Vars
      • R(c);SBLOCK,XB(D)::QAR2(G)
      • B(a);SBLOCK,XS(E)::B(A)+P(B)
      • B(e);SBLOCK,XB(D)::QAB(G)
      • P(d);SBLOCK::S(E)
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