MESON Chess Problem Database

Problem Display
PID: 125905 (2R1B3/8/8/1N1k1bRq/7r/r5n1/1pN5/bKn1Q3 w - - 0 1)

Siotis, Nikos

Canadian Chess Chat, 1981

2R1B3/8/8/1N1k1bRq/7r/r5n1/1pN5/bKn1Q3

#2

7 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Bf7#
    • 1...Qf3
      • 2.Bf7#
    • 1...Qg4
      • 2.Bf7#
    • 1...Qf7
      • 2.Bxf7#
    • 1...Qh8
      • 2.Bf7#
  • Tries
    • 1.Sc3+?
      • 1...Kd6
        • 2.Rc6#
      • 1...Rxc3!
    • 1.Rd8+?
      • 1...Kc4
        • 2.Qb4#
      • 1...Kc5!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Rc5#
      • 1...Rc3
        • 2.Sxc3#
      • 1...Rc4
        • 2.Rd8#
      • 1...Sb3
        • 2.Sc3#
      • 1...Sd3
        • 2.Se3#
      • 1...Se4
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • Q(i);N_GUARD::B(G)
    • Q(i);N_GUARD::B(G),XQ(i)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(g);N_SPINB(h),P-FLIGHT::R1(F)
      • Refutation
        • R(d);XS(D)
    • Try
      • R(F);CHECK
      • Vars
        • K(g);N_SPINB(h),S_FLIGHT::QAR1(B)
      • Refutation
        • K(g);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • R1(F)
    • Vars
      • R(d);N_GUARD::S(D),XR(d)
      • R(f);SBLOCK::R(F)
      • S(b);S_CUTR(d)::S(D)
      • S(b);N_PINS(C)::S(C)
      • S(e);N_PINS(C)::S(C)
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