MESON Chess Problem Database

Problem Display
PID: 80824 (8/8/6Q1/3R4/5p2/4pk2/3n4/4K3 w - - 0 1)

Fjellstrom, Zakarias

Springaren, 1953

8/8/6Q1/3R4/5p2/4pk2/3n4/4K3

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...e2
      • 2.Rd3#
  • Tries
    • 1.Rxd2?
      • threat
        • 2.Qg2#
      • 1...e2
        • 2.Rd3#
      • 1...exd2+!
    • 1.Qh5+?
      • 1...Kg2
        • 2.Rg5#
      • 1...Kg3
        • 2.Rg5#
      • 1...Ke4!
  • Keys
    • 1.Rg5!
      • 1...e2
        • 2.Qd3#
      • 1...Sb1
        • 2.Qc6#
      • 1...Sf1
        • 2.Qc6#
      • 1...Sb3
        • 2.Qc6#
      • 1...Sc4
        • 2.Qc6#
      • 1...Se4
        • 2.Qh5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB::R(B)
  • Tries
    • Try
      • R(B);XS(a)
      • Threat
        • QAB1(C)
      • Vars
        • P(b);OGATEB::R(B)
      • Refutation
        • P(b);CHECK,XR(B)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);S_FLIGHT::R(B)
        • K(c);P-FLIGHT::R(B)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • R(B);
    • Vars
      • P(b);OGATEB::QAR2(C)
      • S(a);N_GUARD::QAB(C)
      • S(a);SBLOCK::QAB(C)
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