MESON Chess Problem Database

Problem Display
PID: 261412 (bQ1n1b2/1n4p1/8/2p1B3/r1k5/p2N4/4P3/1RK4B w - - 0 1)

Groeneveld, Cornelis

Neue Zurcher Zeitung, 1999

bQ1n1b2/1n4p1/8/2p1B3/r1k5/p2N4/4P3/1RK4B

#2

7 + 9

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sa5
      • 2.Qb5#
    • 1...Sd6
      • 2.Qb3#
  • Tries
    • 1.Sf4?
      • threat
        • 2.Bd5#
      • 1...Sa5
        • 2.Qb5#
      • 1...Sd6
        • 2.Qb3#
      • 1...Rb4!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Qg4#
      • 1...Rb4
        • 2.Rxb4#
      • 1...Sa5
        • 2.Qa6#
      • 1...Sd6
        • 2.Qxc5#
      • 1...Sc6
        • 2.Qe6#
      • 1...Se6
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(e);OGATE::QAB1(G)
  • Tries
    • Try
      • S(E);
      • Threat
        • B(C)
      • Vars
        • S(e);OGATE::QAB1(G)
      • Refutation
        • R(b);
  • Actual
    • Q(G);P_PINP(d)
    • Threat
      • QAR(G)
    • Vars
      • R(b);N_GUARD::R1(A),XR(b)
      • S(e);OGATE::QAB(G)
      • S(e);N_GUARD,S_CUTB(i)::QAR1(G),XP(d)
      • S(h);N_GUARD,N_SPINP(d)::QAB(G)
      • S(h);N_GUARD::QAB(G),XS(h)
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