MESON Chess Problem Database

Problem Display
PID: 235269 (2q4Q/1pp3r1/5R2/1PP2P2/3PR3/1B4pb/2K1P3/k7 w - - 0 1)

Heyl, Peter

Schach, 2013

2q4Q/1pp3r1/5R2/1PP2P2/3PR3/1B4pb/2K1P3/k7

#2

10 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf5
      • 2.Qa8#
    • 1...Qd7
      • 2.Qa8#
    • 1...Qa8
      • 2.Qxa8#
    • 1...Bg4
      • 2.Qh1#
    • 1...Bxf5
      • 2.Qh1#
  • Tries
    • 1.Qxh3?
      • threat
        • 2.Qf1#
        • 2.Qh1#
      • 1...Qh8
        • 2.Qf1#
      • 1...Rh7
        • 2.Qf1#
      • 1...g2
        • 2.Qc3#
      • 1...Qxf5!
  • Keys
    • 1.d5!
      • threat
        • 2.Ra4#
      • 1...Qxf5
        • 2.Qa8#
      • 1...Bxf5
        • 2.Qh1#
      • 1...Qa8
        • 2.Qxa8#
      • 1...Rg4
        • 2.Ra6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(g);OGATE,P_PINR(E),XP(H)::QAB(J)
    • Q(g);OGATE::QAB(J)
    • Q(g);OGATE::QAB(J),XQ(g)
    • B(c);OGATE::QAB1(J)
    • B(c);OGATE,P_PINR(E),XP(H)::QAB1(J)
  • Tries
    • Try
      • Q(J);XB(c)
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);::QAR(J)
        • R(f);::QAR(J)
        • P(b);OGATE::QAB(J)
      • Refutation
        • Q(g);P_PINR(E),XP(H)
  • Actual
    • P(D);
    • Threat
      • R(E)
    • Vars
      • Q(g);OGATE,P_PINR(E),XP(H)::QAB(J)
      • B(c);OGATE,P_PINR(E),XP(H)::QAB1(J)
      • Q(g);OGATE::QAB(J),XQ(g)
      • R(f);::QAB(J)+R(I),DCHECK
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