MESON Chess Problem Database

Problem Display
PID: 241069 (3NK2Q/8/8/3k4/1B2p3/N7/8/8 w - - 0 1)

Maeder, Thomas

Schweizerische Schachzeitung, 1989

3NK2Q/8/8/3k4/1B2p3/N7/8/8

#2

5 + 2

5454 Near Snap 2023

SOLUTION

  • SOUND
  • Tries
    • 1.Sc2?
      • threat
        • 2.Se3#
        • 2.Qd4#
      • 1...e3
        • 2.Qd4#
      • 1...Kc4!
    • 1.Ba5?
      • 1...Kc5
        • 2.Qe5#
      • 1...Kd6
        • 2.Qd4#
      • 1...e3!
    • 1.Bc5?
      • threat
        • 2.Qd4#
        • 2.Qh5#
      • 1...e3
        • 2.Qd4#
      • 1...Kxc5!
  • Keys
    • 1.Bc3!
      • threat
        • 2.Qd4#
        • 2.Qe5#
      • 1...Kc5
        • 2.Qd4#
      • 1...Kd6
        • 2.Qe5#

Anticipated by 38982(1972), 125339(1972), 12379(1978)

This is after

After H. Krull.

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::QAR1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(B);
      • Vars
        • K(b);P-FLIGHT::QAR2(E)
      • Refutation
        • P(a);
    • Try
      • B(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::QAR1(E)
      • Refutation
        • K(b);P-FLIGHT,XB(B)
  • Actual
    • B(B);
    • Threat
      • DUALS(2)
    • Vars
      • K(b);P-FLIGHT::QAB1(E)
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