MESON Chess Problem Database

Problem Display
PID: 187893 (8/3p4/3p2K1/P1NpN1Q1/P2k4/3P4/8/8 w - - 0 1)

Modin, Carl Edvin

Aftonbladet, 1910

8/3p4/3p2K1/P1NpN1Q1/P2k4/3P4/8/8

#2

7 + 4

6490 yacpdb 2019
5454 Near Snap 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sf3+?
      • 1...Kc3
        • 2.Qd2#
      • 1...Kxc5!
    • 1.Sc6+?
      • 1...Kc3
        • 2.Qc1#
      • 1...Kxc5
        • 2.Qc1#
      • 1...dxc6!
    • 1.Qg1+?
      • 1...Kxe5
        • 2.Qe3#
      • 1...Kc3!
  • Keys
    • 1.Qd2!
      • 1...Kxc5
        • 2.Qc3#
        • 2.d4#
      • 1...Kxe5
        • 2.Qe3#
        • 2.d4#
      • 1...dxc5
        • 2.Sf3#
      • 1...dxe5
        • 2.Sb3#

Anticipated by 223311(1886)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT,XS(D)
    • Try
      • S(E);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(F)
        • K(a);P_SPINP(b),S_FLIGHT,XS(D)::QAR(F)
      • Refutation
        • P(d);XS(E)
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);S_FLIGHT,XS(E)::QAR2(F)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(F);
    • Vars
      • P(c);SBLOCK,XS(D)::S(E)
      • P(c);SBLOCK,XS(E)::S(D)
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