MESON Chess Problem Database

Problem Display
PID: 274465 (1q6/8/3p4/R1PP2Rp/B1kN3K/2P1Q2p/r7/Nr6 w - - 0 1)

Jonsson, Christer

Springaren, 1991

1q6/8/3p4/R1PP2Rp/B1kN3K/2P1Q2p/r7/Nr6

#2

10 + 7

SOLUTION

  • SOUND
  • Tries
    • 1.Sdb3?
      • threat
        • 2.Qd4#
      • 1...dxc5
        • 2.Rxc5#
      • 1...Qh8
        • 2.Bb5#
      • 1...Rd2
        • 2.Sxd2#
      • 1...Rd1!
  • Keys
    • 1.Sb5!
      • threat
        • 2.Qd4#
      • 1...dxc5
        • 2.Qe4#
      • 1...Rd1
        • 2.Bb3#
      • 1...Qh8
        • 2.Sxd6#
      • 1...Rd2
        • 2.Sa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);
      • Threat
        • QAR1(C)
      • Vars
        • P(f);OGATE,XP(H)::R1(G),XP(f)
        • Q(g);N_GUARD::B(D)
        • R(b);N_GUARD::S(E),XR(b)
      • Refutation
        • R(a);
  • Actual
    • S(E);
    • Threat
      • QAR1(C)
    • Vars
      • P(f);SBLOCK,XP(H)::QAR2(C)
      • R(a);N_GUARD::B(D)
      • Q(g);N_GUARD::S(E),XP(f)
      • R(b);N_GUARD::S(E)
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