MESON Chess Problem Database

Problem Display
PID: 141279 (b5K1/1n5B/2pN4/3k4/1Rp2Q2/8/8/8 w - - 0 1)

Ahlheim, Karl-Heinz

Deutsche Schachzeitung, 1987

b5K1/1n5B/2pN4/3k4/1Rp2Q2/8/8/8

#2

5 + 5

SOLUTION

  • SOUND
  • Tries
    • 1.Sxc4?
      • threat
        • 2.Qe5#
      • 1...Ke6
        • 2.Qf7#
      • 1...c5
        • 2.Qe4#
      • 1...Kc5!
    • 1.Sxb7?
      • threat
        • 2.Qd6#
        • 2.Qe4#
      • 1...Ke6
        • 2.Qd6#
      • 1...Bxb7!
    • 1.Sf7?
      • threat
        • 2.Qe5#
        • 2.Qxc4#
      • 1...Kc5
        • 2.Qxc4#
      • 1...Sa5
        • 2.Qe5#
        • 2.Qd6#
      • 1...Sd6
        • 2.Qe5#
        • 2.Qxd6#
      • 1...c3
        • 2.Qe5#
        • 2.Qc4#
        • 2.Qf5#
      • 1...c5
        • 2.Qe4#
      • 1...Ke6!
    • 1.Se8?
      • 1...Kc5
        • 2.Qxc4#
      • 1...Sa5
        • 2.Qd6#
      • 1...Sc5
        • 2.Sc7#
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sd8
        • 2.Qd6#
      • 1...c3
        • 2.Qf5#
      • 1...c5
        • 2.Qe4#
      • 1...Ke6!
  • Keys
    • 1.Sc8!
      • 1...Kc5
        • 2.Qxc4#
      • 1...Ke6
        • 2.Qf5#
      • 1...Sa5
        • 2.Qd6#
      • 1...Sc5
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sd8
        • 2.Qd6#
      • 1...c3
        • 2.Qf5#
      • 1...c5
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);XP(a)
      • Threat
        • QAR1(B)
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
        • P(c);SBLOCK::QAB1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(C);XS(d)
      • Threat
        • DUALS(2)
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
      • Refutation
        • B(e);XS(C)
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::QAR1(B),XP(a)
        • P(c);SBLOCK::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(C);
      • Vars
        • K(b);P-FLIGHT::QAR1(B),XP(a)
        • S(d);N_GUARD::QAR1(B)
        • S(d);N_GUARD::QAR1(B),XS(d)
        • P(a);::QAR2(B)
        • P(c);SBLOCK::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(b);P-FLIGHT::QAR1(B),XP(a)
      • K(b);S_FLIGHT::QAB1(B)
      • S(d);N_GUARD::QAR1(B)
      • S(d);N_GUARD::QAR1(B),XS(d)
      • P(a);::QAR2(B)
      • P(c);SBLOCK::QAB1(B)
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