MESON Chess Problem Database

Problem Display
PID: 223474 (8/8/8/N2Q4/8/8/Nk6/4K3 w - - 0 1)

Springer, Franz

Funkschach, 1926

8/8/8/N2Q4/8/8/Nk6/4K3

#2

4 + 1

5454 Near Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc2
      • 2.Qb3#
    • 1...Ka3
      • 2.Qb3#
  • Tries
    • 1.Qd1?
      • 1...Ka3
        • 2.Qb3#
      • 1...Kxa2!
  • Keys
    • 1.Sc3!
      • 1...Ka1
        • 2.Qa2#
      • 1...Kc1
        • 2.Qd2#
      • 1...Kc2
        • 2.Qd2#
      • 1...Ka3
        • 2.Qb3#
      • 1...Kxc3
        • 2.Qd2#

Anticipated by 208731(1875)

This anticipates 132484(1964), 77651(1998)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAB1(D)
    • K(a);S_FLIGHT::QAR1(D)
  • Tries
    • Try
      • Q(D);
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
  • Actual
    • S(B);
    • Vars
      • K(a);S_FLIGHT::QAR1(D)
      • K(a);S_FLIGHT::QAB1(D)
      • K(a);P-FLIGHT::QAR1(D)
      • K(a);S_FLIGHT,XS(B)::QAB1(D)
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