MESON Chess Problem Database

Problem Display
PID: 211426 (8/4p3/pQN5/p2kp3/P3N1P1/4P3/5K2/8 w - - 0 1)

Holler, Werner

Schach-Echo, 1985

8/4p3/pQN5/p2kp3/P3N1P1/4P3/5K2/8

#2

7 + 5

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sxe5?
      • 1...Kxe4
        • 2.Qd4#
      • 1...e6
        • 2.Qd4#
      • 1...Kxe5!
    • 1.Sxe7+?
      • 1...Kxe4
        • 2.Qb1#
        • 2.Qg6#
      • 1...Kc4!
    • 1.Qc5+?
      • 1...Kxe4
        • 2.Qc4#
      • 1...Ke6!
    • 1.Qb3+?
      • 1...Kxe4
        • 2.Qc4#
      • 1...Kxc6!
    • 1.Qb5+?
      • 1...Kxe4
        • 2.Qc4#
      • 1...Ke6
        • 2.Sd8#
      • 1...axb5!
  • Keys
    • 1.Qb7!
      • 1...Kc4
        • 2.Sxe5#
      • 1...Kxe4
        • 2.Sb4#
      • 1...Ke6
        • 2.Sd8#
      • 1...e6
        • 2.Sxa5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(G);XP(c)
      • Vars
        • K(b);S_FLIGHT,XS(D)::QAR1(F)
        • P(e);SBLOCK::QAR1(F)
      • Refutation
        • K(b);P-FLIGHT,XS(G)
    • Try
      • S(G);CHECK,XP(e)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);S_FLIGHT,XS(D)::QAR2(F)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);S_FLIGHT,XS(D)::QAR2(F)
      • Refutation
        • K(b);S_FLIGHT,XS(G)
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);S_FLIGHT,XS(D)::QAR2(F)
        • K(b);S_FLIGHT::S(G)
      • Refutation
        • P(d);XQ(F)
  • Actual
    • Q(F);
    • Vars
      • K(b);S_FLIGHT::S(G),XP(c)
      • K(b);S_FLIGHT,XS(D)::QAB(F)+S(G)
      • K(b);S_FLIGHT::S(G)
      • P(e);SBLOCK::QAB(F)+S(G),XP(a)
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