MESON Chess Problem Database

Problem Display
PID: 96947 (2K3bn/2p1R3/3p3p/3Qbk1P/2P3pB/3p2P1/3P3N/2n5 w - - 0 1)

Belliboni, Caetano

Introducao ao Problema Ortodoxo, 1981

2K3bn/2p1R3/3p3p/3Qbk1P/2P3pB/3p2P1/3P3N/2n5

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Qxd3#
    • 1...Se2
      • 2.Qxd3#
    • 1...Sb3
      • 2.Qxd3#
  • Tries
    • 1.Qf3+?
      • 1...Bf4
        • 2.Qe4#
        • 2.Qxg4#
        • 2.Qxf4#
      • 1...gxf3!
    • 1.Qe6+?
      • 1...Ke4
        • 2.Qxg4#
      • 1...Bxe6+!
  • Keys
    • 1.Qxg8!
      • threat
        • 2.Qxg4#
      • 1...Ke4
        • 2.Qxg4#
      • 1...Bg7
        • 2.Qe6#
      • 1...Sg6
        • 2.Qxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::QAB(F),XP(b)
  • Tries
    • Try
      • Q(F);CHECK,N_PINB(d)
      • Refutation
        • P(c);XQ(F)
    • Try
      • Q(F);CHECK,N_PINB(d)
      • Vars
        • K(e);OGATE,P_SPINB(d),S_FLIGHT::QAR2(F),XP(c)
      • Refutation
        • B(i);CHECK,XQ(F)
  • Actual
    • Q(F);N_PINB(d),XB(i)
    • Threat
      • QAB1(F),XP(c)
    • Vars
      • K(e);P_SPINB(d),S_FLIGHT::QAR2(F),XP(c)
      • B(d);::QAB1(F)
      • S(j);N_GUARD::QAB1(F),XS(j)
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