MESON Chess Problem Database

Problem Display
PID: 60938 (r3k1n1/5RP1/5PB1/4B3/8/3N2n1/8/2RK4 w q - 0 1)

McIntyre, Donald Glenoe

South African Chess Magazine, 1946

r3k1n1/5RP1/5PB1/4B3/8/3N2n1/8/2RK4

#2

8 + 4

5639 Some Problems For My Friends 1957

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Rc8#
    • 1...Ra3
      • 2.Rc8#
    • 1...Ra4
      • 2.Rc8#
    • 1...Ra5
      • 2.Rc8#
    • 1...Ra6
      • 2.Rc8#
    • 1...Ra7
      • 2.Rc8#
    • 1...Rc8
      • 2.Rxc8#
    • 1...Rd8
      • 2.Ra7#
      • 2.Rb7#
      • 2.Rfc7#
      • 2.Re7#
  • Tries
    • 1.Bc7?
      • threat
        • 2.Re7#
      • 1...Se7
        • 2.Rxe7#
      • 1...Sxf6!
    • 1.Rcc7?
      • threat
        • 2.Rfd7#
        • 2.Rf8#
      • 1...Kd8
        • 2.Rfd7#
        • 2.Rf8#
      • 1...Sh6
        • 2.Rf8#
      • 1...Se7
        • 2.Rf8#
      • 1...Ra1+!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Rd7#
        • 2.Rf8#
      • 1...Rd8+
        • 2.Rd7#
      • 1...0-0-0+
        • 2.Sd3#
      • 1...Kd8
        • 2.Rf8#
      • 1...Sxf6
        • 2.Rd7#
      • 1...Sh6
        • 2.Rf8#
      • 1...Se7
        • 2.Rf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 7
  • Sets
    • R(b);N_GUARD::R(A)
    • R(b);N_GUARD::R(A),XR(b)
  • Tries
    • Try
      • B(D);
      • Threat
        • B(F)+R(G),DCHECK
      • Vars
        • S(d);::B(F)+R(G),DCHECK,XS(d)
      • Refutation
        • S(d);XP(E)
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(d);::B(F)+R(G),DCHECK
      • Refutation
        • R(b);CHECK
  • Actual
    • S(C);
    • Threat
      • DUALS(2)
    • Vars
      • R(b);CHECK::B(F)+R(G)
      • K(c);0-0-0,CHECK::R(A)+S(C)
      • K(c);P-FLIGHT::R(G)
      • S(d);XP(E)::B(F)+R(G)
      • S(d);::B(F)+R(G),DCHECK
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