MESON Chess Problem Database

Problem Display
PID: 145102 (R5rr/2Pp1B2/1p1KP1P1/4Np2/3PkPp1/3NB1P1/2P2P2/Q6R w - - 0 1)

O'Shea, Patrick

The Problemist, 1996

R5rr/2Pp1B2/1p1KP1P1/4Np2/3PkPp1/3NB1P1/2P2P2/Q6R

#2

16 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rxh1
      • 2.Qxh1#
    • 1...b5
      • 2.Sc5#
  • Tries
    • 1.Ra4?
      • threat
        • 2.d5#
      • 1...b5
        • 2.Sc5#
      • 1...Ra8!
    • 1.Qa4?
      • threat
        • 2.d5#
      • 1...b5
        • 2.Sc5#
      • 1...Rxa8!
    • 1.Qa5?
      • threat
        • 2.Qd5#
      • 1...bxa5
        • 2.Sc5#
      • 1...b5
        • 2.Sc5#
      • 1...dxe6!
  • Keys
    • 1.d5!
      • threat
        • 2.Ra4#
        • 2.Qd4#
        • 2.Qa4#
      • 1...Rxa8
        • 2.Qd4#
      • 1...b5
        • 2.Sc5#
        • 2.Qd4#

This is after

After A. Dobrila.

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(g);OGATE,XR(B)::QAB(A),XR(g)
    • P(d);N_GUARD::S(E)
  • Tries
    • Try
      • R(P);
      • Threat
        • R(P)+P(H)
      • Vars
        • P(d);N_GUARD::S(E)
      • Refutation
        • R(f);
    • Try
      • Q(A);
      • Threat
        • QAR(A)+P(H)
      • Vars
        • P(d);N_GUARD::S(E)
      • Refutation
        • R(f);XR(P)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • P(d);N_GUARD,XQ(A)::S(E)
        • P(d);N_GUARD::S(E)
      • Refutation
        • P(e);XP(L)
  • Actual
    • P(H);
    • Threat
      • DUALS(3)
    • Vars
      • R(f);XR(P)::QAR1(A)
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