MESON Chess Problem Database

Problem Display
PID: 120001 (8/8/7r/3p4/5BQ1/7p/8/3K3k w - - 0 1)

Nielsen, Kristian

Hamar Arbeiderbladet, 1971

8/8/7r/3p4/5BQ1/7p/8/3K3k

#2

3 + 4

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qe2?
      • threat
        • 2.Qf1#
        • 2.Qh2#
      • 1...Rg6
        • 2.Qh2#
      • 1...h2
        • 2.Qf1#
      • 1...Kg1!
    • 1.Qxh3+?
      • 1...Kg1
        • 2.Be3#
      • 1...Rxh3!
  • Keys
    • 1.Be3!
      • threat
        • 2.Qg1#
      • 1...Kh2
        • 2.Qg1#
      • 1...Rg6
        • 2.Qxh3#
      • 1...h2
        • 2.Qf3#

Anticipated by 121497(1947)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);::QAR1(C)
        • P(b);::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK,XP(b)
      • Vars
        • K(a);P-FLIGHT::B(B)
      • Refutation
        • R(d);XQ(C)
  • Actual
    • B(B);
    • Threat
      • QAR1(C)
    • Vars
      • K(a);P-FLIGHT::QAB1(C)
      • R(d);N_GUARD::QAR2(C),XP(b)
      • P(b);SBLOCK::QAB(C)
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