MESON Chess Problem Database

Problem Display
PID: 124452 (Rr1B4/8/3p2p1/3p1R2/1n2k1P1/1Q6/4N2p/1KN1b2q w - - 0 1)

Belliboni, Caetano

Introducao ao Problema Ortodoxo, 1981

Rr1B4/8/3p2p1/3p1R2/1n2k1P1/1Q6/4N2p/1KN1b2q

#2

8 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3
      • 2.Qxf3#
    • 1...Qg1
      • 2.Qf3#
    • 1...d4
      • 2.Qe6#
  • Tries
    • 1.Qc4+?
      • 1...Ke3
        • 2.Bg5#
        • 2.Qd4#
        • 2.Qf4#
      • 1...d4
        • 2.Qe6#
        • 2.Qxd4#
      • 1...dxc4!
    • 1.Qxd5+?
      • 1...Ke3
        • 2.Bg5#
        • 2.Qd4#
      • 1...Sxd5+!
  • Keys
    • 1.Bb6!
      • threat
        • 2.Qe3#
      • 1...Rxb6
        • 2.Re8#
      • 1...Qf3
        • 2.Qxf3#
      • 1...Qg1
        • 2.Qf3#
      • 1...Bd2
        • 2.Sg3#
      • 1...Bf2
        • 2.Sc3#
      • 1...Bc3
        • 2.Sxc3#
        • 2.Sg3#
      • 1...Sc2
        • 2.Qxc2#
        • 2.Qxd5#
        • 2.Qd3#
      • 1...Sd3
        • 2.Qxd5#
        • 2.Qxd3#
      • 1...d4
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(b);N_GUARD::QAB1(D),XQ(b)
    • Q(b);N_GUARD::QAB1(D)
    • P(f);OGATE::QAR2(D)
  • Tries
    • Try
      • Q(D);CHECK
      • Refutation
        • P(f);XQ(D)
    • Try
      • Q(D);CHECK,XP(f)
      • Refutation
        • S(d);CHECK,XQ(D)
  • Actual
    • B(H);
    • Threat
      • QAR1(D)
    • Vars
      • R(i);OGATE,XB(H)::R(G)
      • Q(b);N_GUARD::QAB1(D),XQ(b)
      • Q(b);N_GUARD::QAB1(D)
      • B(a);N_GUARD,P_PINS(B)::S(C)
      • P(f);OGATE::QAR2(D)
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