MESON Chess Problem Database

Problem Display
PID: 124446 (kB2n3/1p1N4/p7/1RP5/8/6K1/8/Q7 w - - 0 1)

Belliboni, Caetano

Diario de Sao Paulo, 1945

kB2n3/1p1N4/p7/1RP5/8/6K1/8/Q7

#2

6 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...a5
      • 2.Rxa5#
      • 2.Qxa5#
    • 1...b6
      • 2.Qh1#
      • 2.Qxa6#
  • Tries
    • 1.Rxb7?
      • threat
        • 2.Ra7#
        • 2.Qxa6#
      • 1...Sc7
        • 2.Ra7#
      • 1...a5
        • 2.Ra7#
      • 1...Kxb7!
    • 1.Qh1?
      • threat
        • 2.Qxb7#
      • 1...axb5
        • 2.Qa1#
      • 1...Sd6!
    • 1.c6?
      • threat
        • 2.cxb7#
      • 1...bxc6
        • 2.Qxa6#
      • 1...b6
        • 2.Qxa6#
      • 1...Sd6!
  • Keys
    • 1.Qh8!
      • 1...axb5
        • 2.Qa1#
      • 1...b6
        • 2.Qh1#
      • 1...Sd6
        • 2.Sb6#
      • 1...Sf6
        • 2.Sb6#
      • 1...Sc7
        • 2.Sb6#
      • 1...Sg7
        • 2.Sb6#
      • 1...a5
        • 2.Rxa5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • S(d);::R1(C)
        • P(a);::R1(C)
      • Refutation
        • K(c);N_SPINP(a),S_FLIGHT,XR(C)
    • Try
      • Q(A);N_PINP(a),P_PINP(b)
      • Threat
        • QAB1(A),XP(b)
      • Vars
        • P(a);OGATEB,XR(C)::QAB(A)
      • Refutation
        • S(d);
    • Try
      • P(D);
      • Threat
        • P(D),XP(b)
      • Vars
        • P(b);N_GUARD,XP(D)::QAR2(A),XP(a)
        • P(b);N_GUARD::QAR2(A),XP(a)
      • Refutation
        • S(d);
  • Actual
    • Q(A);N_PINP(a)
    • Vars
      • P(a);OGATEB,XR(C)::QAB(A)
      • P(b);OGATEB::QAB(A)
      • S(d);::S(E)
      • P(a);OGATEB::R(C),XP(a)
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