MESON Chess Problem Database

Problem Display
PID: 199686 (8/3Rp3/8/5NRp/3Pk3/4p1PK/b7/n2Q4 w - - 0 1)

Holroyd, GC

The Observer, 1946

(First published on Sun Apr 21 1946)

8/3Rp3/8/5NRp/3Pk3/4p1PK/b7/n2Q4

#2

7 + 6

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...e2
      • 2.Qxe2#
    • 1...e6
      • 2.Sd6#
  • Tries
    • 1.Sh4?
      • threat
        • 2.Re5#
      • 1...e5
        • 2.Rxe5#
      • 1...Be6+!
    • 1.Sh6?
      • threat
        • 2.Re5#
      • 1...e2
        • 2.Qxe2#
      • 1...e5
        • 2.Rxe5#
      • 1...Be6+!
    • 1.Sxe7?
      • threat
        • 2.Re5#
      • 1...e2
        • 2.Qxe2#
      • 1...Be6+!
    • 1.Sg7?
      • threat
        • 2.Re5#
      • 1...e2
        • 2.Qxe2#
      • 1...e5
        • 2.Rxe5#
      • 1...Be6+!
    • 1.Qc2+?
      • 1...Kf3
        • 2.Sh4#
        • 2.Qg2#
      • 1...Sxc2!
    • 1.Qd3+?
      • 1...Kf3
        • 2.Qxe3#
      • 1...Kxd3!
  • Keys
    • 1.d5!
      • threat
        • 2.Rxe7#
      • 1...Ke5
        • 2.Qd4#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...e2
        • 2.Qxe2#
      • 1...e5
        • 2.Sd6#
      • 1...e6
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB::QAR2(A),XP(c)
    • P(f);N_GUARD::S(E)
  • Tries
    • Try
      • S(E);
      • Threat
        • R1(F)
      • Vars
        • P(f);::R1(F),XP(f)
      • Refutation
        • B(b);CHECK
    • Try
      • S(E);
      • Threat
        • R1(F)
      • Vars
        • P(c);OGATEB::QAR2(A),XP(c)
        • P(f);::R1(F),XP(f)
      • Refutation
        • B(b);CHECK
    • Try
      • S(E);XP(f)
      • Threat
        • R1(F)
      • Vars
        • P(c);OGATEB::QAR2(A),XP(c)
      • Refutation
        • B(b);CHECK
    • Try
      • S(E);
      • Threat
        • R1(F)
      • Vars
        • P(c);OGATEB::QAR2(A),XP(c)
        • P(f);::R1(F),XP(f)
      • Refutation
        • B(b);CHECK
    • Try
      • Q(A);CHECK
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);P_SPINP(c),S_FLIGHT::QAR1(A),XP(c)
      • Refutation
        • K(d);S_FLIGHT,XQ(A)
  • Actual
    • P(D);
    • Threat
      • R(G),XP(f)
    • Vars
      • K(d);P-FLIGHT::QAB1(A)
      • B(b);OGATE,XP(D)::QAB1(A),XB(b)
      • P(c);OGATEB::QAR2(A),XP(c)
      • P(f);N_GUARD::S(E)
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