MESON Chess Problem Database

Problem Display
PID: 233832 (8/4Q3/8/6P1/2pK1p2/5p2/4Nk2/6R1 w - - 0 1)

Holler, Werner

Freie Presse, 1997

8/4Q3/8/6P1/2pK1p2/5p2/4Nk2/6R1

#2

5 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qc5?
      • 1...fxe2
        • 2.Ke4#
      • 1...c3
        • 2.Kd3#
      • 1...Kxe2!
    • 1.Qe4?
      • 1...fxe2
        • 2.Qg2#
      • 1...c3!
    • 1.Qb7?
      • 1...Kxe2
        • 2.Qb2#
      • 1...fxe2
        • 2.Qg2#
      • 1...c3!
    • 1.Qh7?
      • threat
        • 2.Qh2#
      • 1...Kxe2
        • 2.Qc2#
      • 1...fxe2!
  • Keys
    • 1.Qa7!
      • 1...Kxe2
        • 2.Qa2#
      • 1...fxe2
        • 2.Ke4#
      • 1...c3
        • 2.Kd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);
      • Vars
        • P(b);SBLOCK,XS(B)::QAB(E)+K(C)
        • P(c);::QAB(E)+K(C)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
    • Try
      • Q(E);
      • Vars
        • P(b);OGATE,SBLOCK,XS(B)::QAR1(E)
      • Refutation
        • P(c);
    • Try
      • Q(E);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(B)::QAR(E)
        • P(b);OGATE,SBLOCK,XS(B)::QAR1(E)
      • Refutation
        • P(c);
    • Try
      • Q(E);
      • Threat
        • QAR2(E)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(B)::QAR2(E)
      • Refutation
        • P(b);XS(B)
  • Actual
    • Q(E);
    • Vars
      • K(a);OGATEB,P-FLIGHT,XS(B)::QAR(E)
      • P(b);SBLOCK,XS(B)::QAB(E)+K(C)
      • P(c);::QAB(E)+K(C)
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