MESON Chess Problem Database

Problem Display
PID: 101381 (2RrQ3/8/3R4/1K6/3NN3/1pPk1B2/2r5/8 w - - 0 1)

Sparke, Arthur M

Good Companions, 1919

2RrQ3/8/3R4/1K6/3NN3/1pPk1B2/2r5/8

#2

8 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc3
      • 2.Rxc3#
    • 1...Rxc8
      • 2.Sf5#
    • 1...Rxe8
      • 2.Sf5#
  • Tries
    • 1.Sf2+?
      • 1...Kd2
        • 2.Sxb3#
      • 1...Rxf2!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Qe2#
      • 1...Kxd2
        • 2.Sxb3#
      • 1...Rxd2
        • 2.Qe4#
      • 1...Rxc8
        • 2.Se2#
      • 1...Rxe8
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(a);OGATE,XP(A)::R1(G),XR(a)
    • R(d);N_GUARD,XR(G)::R(F)+S(C)
    • R(d);N_GUARD,XQ(H)::R(F)+S(C)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(c);P-FLIGHT::R(F)+S(C),DCHECK,XP(b)
      • Refutation
        • R(a);XS(D)
  • Actual
    • S(D);
    • Threat
      • QAB1(H)
    • Vars
      • K(c);P-FLIGHT,XS(D)::R(F)+S(C),DCHECK,XP(b)
      • R(a);SBLOCK,XS(D)::QAB1(H)
      • R(d);N_GUARD,XR(G)::R(F)+S(C)
      • R(d);N_GUARD,XQ(H)::R(F)+S(C)
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