MESON Chess Problem Database

Problem Display
PID: 152303 (3n1R1r/2br1b2/3p3N/8/3pp3/Q2P4/R2B1kBK/2N5 w - - 0 1)

Guidelli, Giorgio

Good Companions (October), 1915

3n1R1r/2br1b2/3p3N/8/3pp3/Q2P4/R2B1kBK/2N5

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf8
      • 2.Sg4#
  • Tries
    • 1.Qc3?
      • threat
        • 2.Bg5#
      • 1...Rxh6+
        • 2.Bxh6#
      • 1...d5+
        • 2.Bf4#
      • 1...Rxf8
        • 2.Sg4#
      • 1...exd3
        • 2.Qxd4#
      • 1...e3
        • 2.Be1#
      • 1...dxc3!
    • 1.Qa5?
      • threat
        • 2.Bg5#
        • 2.Qf5#
      • 1...Rxh6+
        • 2.Bxh6#
      • 1...d5+
        • 2.Bf4#
      • 1...Rxf8
        • 2.Sg4#
        • 2.Qf5#
      • 1...exd3
        • 2.Qf5#
      • 1...Se6
        • 2.Bf4#
        • 2.Bg5#
      • 1...e3
        • 2.Be1#
        • 2.Qf5#
      • 1...Bxa5!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Bg5#
      • 1...Rxh6+
        • 2.Bxh6#
      • 1...d5+
        • 2.Bf4#
      • 1...Rxf8
        • 2.Sg4#
      • 1...exd3
        • 2.Qxd4#
      • 1...e3
        • 2.Be1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(i);N_PINS(H),N_SPINB(g),XR(I)::S(H)
  • Tries
    • Try
      • Q(F);
      • Threat
        • R(B)+B(C)
      • Vars
        • R(i);CHECK,OGATE,XS(H)::R(B)+B(C),XR(i)
        • P(d);CHECK::R(B)+B(C)
        • R(i);N_PINS(H),N_SPINB(g),XR(I)::S(H)
        • P(c);N_GUARD,XP(G)::QAB(F),XP(b)
        • P(c);SBLOCK::R(B)+B(C),DCHECK
      • Refutation
        • P(b);XQ(F)
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • R(i);CHECK,OGATE,XS(H)::R(B)+B(C),XR(i)
        • P(d);CHECK::R(B)+B(C)
        • P(c);XP(G)::QAR(F)
      • Refutation
        • B(e);XQ(F)
  • Actual
    • Q(F);
    • Threat
      • R(B)+B(C)
    • Vars
      • R(i);CHECK,OGATE,XS(H)::R(B)+B(C),XR(i)
      • P(d);CHECK::R(B)+B(C)
      • R(i);N_PINS(H),N_SPINB(g),XR(I)::S(H)
      • P(c);N_GUARD,XP(G)::QAB(F),XP(b)
      • P(c);SBLOCK::R(B)+B(C),DCHECK
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