MESON Chess Problem Database

Problem Display
PID: 234580 (8/p4p2/Q7/3P4/1p1kB3/1K4N1/5R2/8 w - - 0 1)

Speckmann, Werner

British Chess Magazine, 1969

8/p4p2/Q7/3P4/1p1kB3/1K4N1/5R2/8

#2

6 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Qxa7#
    • 1...Ke5
      • 2.Qf6#
  • Tries
    • 1.Rd2+?
      • 1...Ke3
        • 2.Qh6#
      • 1...Kc5
        • 2.Qc6#
      • 1...Ke5!
    • 1.Rf5?
      • threat
        • 2.Qxa7#
      • 1...Ke3
        • 2.Qd3#
      • 1...Kc5!
    • 1.Rxf7?
      • 1...Ke3
        • 2.Qd3#
      • 1...Ke5
        • 2.Qf6#
      • 1...Kc5!
    • 1.Qc4+?
      • 1...Ke3
        • 2.Qc5#
      • 1...Ke5!
    • 1.Qa1+?
      • 1...Ke3
        • 2.Qxa7#
      • 1...Kc5!
    • 1.Qb6+?
      • 1...Ke5
        • 2.Rf5#
        • 2.Qf6#
      • 1...axb6!
    • 1.Qf6+?
      • 1...Ke3
        • 2.Re2#
      • 1...Kc5!
  • Keys
    • 1.Rf6!
      • 1...Ke3
        • 2.Qd3#
      • 1...Kc5
        • 2.Qc4#
      • 1...Ke5
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAB(F),XP(c)
    • K(b);S_FLIGHT::QAB1(F)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB(F)
        • K(b);S_FLIGHT::QAR1(F)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(A);
      • Threat
        • QAB(F),XP(c)
      • Vars
        • K(b);S_FLIGHT::QAR1(F)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(A);XP(d)
      • Vars
        • K(b);S_FLIGHT::QAR1(F)
        • K(b);S_FLIGHT::QAB1(F)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB(F)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB(F),XP(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Refutation
        • P(c);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);S_FLIGHT::R1(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(A);
    • Vars
      • K(b);S_FLIGHT::QAR1(F)
      • K(b);S_FLIGHT::QAB(F)
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