MESON Chess Problem Database

Problem Display
PID: 19040 (4K3/4N3/R2rk3/1p4p1/2p1p3/2B5/3P3n/Q7 w - - 0 1)

Pirnie, Duncan

Southern Daily Post, 1911

4K3/4N3/R2rk3/1p4p1/2p1p3/2B5/3P3n/Q7

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa6
      • 2.Qxa6#
    • 1...Rb6
      • 2.Rxb6#
    • 1...Rc6
      • 2.Rxc6#
  • Tries
    • 1.Bg7?
      • threat
        • 2.Qe5#
        • 2.Qf6#
      • 1...Sf3
        • 2.Qf6#
      • 1...c3
        • 2.Qa2#
      • 1...Sg4!
    • 1.Bh8?
      • threat
        • 2.Qe5#
        • 2.Qf6#
      • 1...Sf3
        • 2.Qf6#
      • 1...c3
        • 2.Qa2#
      • 1...Sg4!
    • 1.Qa3?
      • threat
        • 2.Rxd6#
        • 2.Qxd6#
      • 1...Rxa6
        • 2.Qxa6#
      • 1...Rb6
        • 2.Rxb6#
      • 1...Rc6
        • 2.Rxc6#
      • 1...b4!
  • Keys
    • 1.d4!
      • threat
        • 2.d5#
      • 1...Kf6
        • 2.d5#
      • 1...Rxa6
        • 2.Qxa6#
      • 1...cxd4 ep
        • 2.Qa2#
      • 1...exd4 ep
        • 2.Qe1#
      • 1...Rb6
        • 2.Rxb6#
      • 1...Rc6
        • 2.Rxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(f);N_SPINR(f),OGATE,XR(D)::QAR(A),XR(f)
    • R(f);OGATEB::R(D),XR(f)
  • Tries
    • Try
      • B(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAR1(A)
        • P(b);OGATEB::QAB(A)
      • Refutation
        • S(a);
    • Try
      • B(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAR1(A)
        • P(b);OGATEB::QAB(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(f);N_SPINR(f),OGATE,XR(D)::QAR(A),XR(f)
        • R(f);OGATEB::R(D),XR(f)
      • Refutation
        • P(d);
  • Actual
    • P(B);
    • Threat
      • P(B)
    • Vars
      • K(g);P-FLIGHT::B(C)+P(B)
      • R(f);N_SPINR(f),OGATE,XR(D)::QAR(A),XR(f)
      • P(b);EP,OGATEB,XP(B)::QAB(A)
      • P(c);EP,OGATEB,XP(B)::QAR(A)
      • R(f);OGATEB::R(D),XR(f)
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