MESON Chess Problem Database

Problem Display
PID: 234509 (8/2K2p2/4k3/7B/5Q2/8/3N4/8 w - - 0 1)

Speckmann, Werner

Skakbladet, 1962

8/2K2p2/4k3/7B/5Q2/8/3N4/8

#2

4 + 2

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qd6#
    • 1...Ke7
      • 2.Qxf7#
    • 1...f5
      • 2.Qd6#
    • 1...f6
      • 2.Qe4#
  • Tries
    • 1.Kc6?
      • 1...f5
        • 2.Qd6#
      • 1...f6
        • 2.Qe4#
      • 1...Ke7!
    • 1.Sb1?
      • 1...Ke7
        • 2.Qxf7#
      • 1...f5
        • 2.Qd6#
      • 1...f6
        • 2.Qe4#
      • 1...Kd5!
    • 1.Sf1?
      • 1...Ke7
        • 2.Qxf7#
      • 1...f5
        • 2.Qd6#
      • 1...f6
        • 2.Qe4#
      • 1...Kd5!
    • 1.Sf3?
      • threat
        • 2.Qe5#
        • 2.Qxf7#
      • 1...Ke7
        • 2.Qxf7#
      • 1...f5
        • 2.Qe5#
        • 2.Qd6#
      • 1...f6
        • 2.Qe4#
      • 1...Kd5!
    • 1.Sc4?
      • threat
        • 2.Qe5#
        • 2.Qxf7#
      • 1...Ke7
        • 2.Qxf7#
      • 1...f5
        • 2.Qe5#
        • 2.Qd6#
      • 1...f6
        • 2.Qe4#
      • 1...Kd5!
    • 1.Bg6?
      • threat
        • 2.Qd6#
      • 1...Kd5
        • 2.Qd6#
      • 1...Ke7
        • 2.Qxf7#
      • 1...fxg6!
    • 1.Qf5+?
      • 1...Ke7
        • 2.Qxf7#
      • 1...Kxf5!
    • 1.Qf6+?
      • 1...Kd5
        • 2.Qd6#
      • 1...Kxf6!
  • Keys
    • 1.Sb3!
      • 1...Kd5
        • 2.Bxf7#
      • 1...Ke7
        • 2.Qxf7#
      • 1...f5
        • 2.Qd6#
      • 1...f6
        • 2.Qe4#

This anticipates 35611(1990)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR1(B)
    • K(a);P-FLIGHT::QAR1(B),XP(b)
    • P(b);SBLOCK::QAR1(B)
    • P(b);SBLOCK::QAR2(B)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • P(b);SBLOCK::QAR1(B)
        • P(b);SBLOCK::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(B),XP(b)
        • P(b);SBLOCK::QAR1(B)
        • P(b);SBLOCK::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(B),XP(b)
        • P(b);SBLOCK::QAR1(B)
        • P(b);SBLOCK::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR1(B),XP(b)
        • P(b);SBLOCK::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR1(B),XP(b)
        • P(b);SBLOCK::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(C);
      • Threat
        • QAR1(B)
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
        • K(a);P-FLIGHT::QAR1(B),XP(b)
      • Refutation
        • P(b);XB(C)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(B),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
  • Actual
    • S(A);
    • Vars
      • K(a);S_FLIGHT::B(C),XP(b)
      • K(a);P-FLIGHT::QAR1(B),XP(b)
      • P(b);SBLOCK::QAR1(B)
      • P(b);SBLOCK::QAR2(B)
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