MESON Chess Problem Database

Problem Display
PID: 60667 (5b2/3Rr1rq/5n2/KN4P1/1p1Bk2n/7N/1R6/5Q2 w - - 0 1)

McIntyre, Donald Glenoe

South African Chess Magazine, 1940

5b2/3Rr1rq/5n2/KN4P1/1p1Bk2n/7N/1R6/5Q2

#2

8 + 8

5639 Some Problems For My Friends 1957

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Qe2#
    • 1...Rxg5
      • 2.Sxg5#
    • 1...Sf3
      • 2.Qb1#
    • 1...b3
      • 2.Sc3#
  • Tries
    • 1.Sd6+?
      • 1...Kd5
        • 2.Qc4#
      • 1...Kxd4!
    • 1.Bxf6?
      • threat
        • 2.Re2#
        • 2.Qd3#
        • 2.Qf4#
      • 1...Ke3
        • 2.Re2#
        • 2.Qe2#
        • 2.Qf4#
      • 1...Sf3
        • 2.Qd3#
      • 1...Qf5
        • 2.Re2#
        • 2.Qe2#
        • 2.Qd3#
      • 1...Qh5
        • 2.Qd3#
        • 2.Qf4#
      • 1...Sg2
        • 2.Qd3#
      • 1...Sf5
        • 2.Qd3#
        • 2.Qf4#
      • 1...Sg6
        • 2.Re2#
        • 2.Qd3#
      • 1...Rxd7!
  • Keys
    • 1.Rxb4!
      • threat
        • 2.Sc3#
      • 1...Rxg5
        • 2.Sxg5#
      • 1...Sf3
        • 2.Qb1#
      • 1...Qf5
        • 2.Qe2#
      • 1...Re5
        • 2.Bc5#
      • 1...Sd5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(g);P_PINS(F),SBLOCK::QAR2(A)
    • R(f);P_PINS(F),XP(G)::S(C),XR(f)
    • S(c);SBLOCK::QAB(A)
    • P(a);N_GUARD::S(F)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);P-FLIGHT,XB(D)
    • Try
      • B(D);XS(d)
      • Threat
        • DUALS(3)
      • Vars
        • S(c);::QAB1(A)
      • Refutation
        • R(e);XR(H)
  • Actual
    • R(B);XP(a)
    • Threat
      • S(F)
    • Vars
      • R(f);P_PINS(F),XP(G)::S(C),XR(f)
      • S(c);SBLOCK::QAB(A)
      • Q(g);P_PINS(F),SBLOCK::QAR2(A)
      • R(e);P_PINS(F),SBLOCK::R(B)+B(D)
      • S(d);SBLOCK::S(F)
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