MESON Chess Problem Database

Problem Display
PID: 231625 (3NK3/8/8/P2kP3/P4P1N/8/2P5/Q7 w - - 0 1)

Trugly, Pal

Zaszlonk, 1927

3NK3/8/8/P2kP3/P4P1N/8/2P5/Q7

#2

9 + 1

6490 yacpdb 2021
5454 Near Snap 2023

SOLUTION

  • SOUND
  • Tries
    • 1.Sf3?
      • threat
        • 2.Qd4#
      • 1...Kc4
        • 2.Qd4#
      • 1...Kc5
        • 2.Qd4#
      • 1...Ke4!
    • 1.Sf5?
      • threat
        • 2.Qd4#
      • 1...Kc4
        • 2.Qd4#
      • 1...Kc5
        • 2.Qd4#
      • 1...Ke4!
  • Keys
    • 1.Se6!
      • 1...Kc4
        • 2.Qd4#
      • 1...Ke4
        • 2.Qd4#
      • 1...Kc6
        • 2.Qh1#
      • 1...Kxe6
        • 2.Qa2#

Anticipated by 182248(1906)

This anticipates 18870(1958)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(E);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(H);
    • Vars
      • K(a);S_FLIGHT::QAR1(A)
      • K(a);S_FLIGHT::QAB(A)
      • K(a);S_FLIGHT,XS(H)::QAB(A)
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