MESON Chess Problem Database

Problem Display
PID: 208890 (3nKR2/3p2p1/3P2Q1/3pkP2/3p2p1/3P2p1/3NpR2/8 w - - 0 1)

Barrier, ?

American Chess Journal, 1876

3nKR2/3p2p1/3P2Q1/3pkP2/3p2p1/3P2p1/3NpR2/8

#2

8 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Kxd7?
      • threat
        • 2.Qxg7#
      • 1...Se6
        • 2.Qxe6#
      • 1...gxf2!
  • Keys
    • 1.Sf3+!
      • 1...Kf4
        • 2.Qg5#
      • 1...gxf3
        • 2.Qxg3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(G);S_FLIGHT,XP(g)
      • Threat
        • QAB(F),XP(h)
      • Vars
        • S(i);N_GUARD::QAR1(F),XS(i)
      • Refutation
        • P(b);XR(B)
  • Actual
    • S(A);CHECK
    • Vars
      • K(f);S_FLIGHT::QAB1(F)
      • P(d);OGATE,XS(A)::QAB(F),XP(b)
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