MESON Chess Problem Database

Problem Display
PID: 249381 (8/8/8/R4Q2/8/2p5/3n2K1/4k3 w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1971

8/8/8/R4Q2/8/2p5/3n2K1/4k3

#2

3 + 3

5454 Near Snap 2021
6490 yacpdb 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qd3?
      • 1...Kd1
        • 2.Ra1#
      • 1...Sb1
        • 2.Re5#
      • 1...Sf1
        • 2.Ra1#
      • 1...Sb3
        • 2.Re5#
      • 1...Sf3
        • 2.Ra1#
      • 1...Sc4
        • 2.Ra1#
      • 1...Se4
        • 2.Ra1#
      • 1...c2!
  • Keys
    • 1.Qc2!
      • 1...Ke2
        • 2.Re5#
      • 1...Sb1
        • 2.Re5#
      • 1...Sf1
        • 2.Ra1#
      • 1...Sb3
        • 2.Re5#
      • 1...Sf3
        • 2.Ra1#
      • 1...Sc4
        • 2.Ra1#
      • 1...Se4
        • 2.Ra1#

This anticipates 115136(1989), 24621(1992)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT,P_SPINS(b)::R(B)
        • S(b);N_GUARD::R(B)
      • Refutation
        • P(c);
  • Actual
    • Q(C);
    • Vars
      • K(a);P-FLIGHT,P_SPINS(b)::R(B)
      • S(b);N_GUARD::R(B)
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