MESON Chess Problem Database

Problem Display
PID: 41558 (3b3B/3K1Q2/3RN2N/6pB/3pkpr1/5R1q/5npP/8 w - - 0 1)

Gockel, Hubert

Die Schwalbe, 2002

3b3B/3K1Q2/3RN2N/6pB/3pkpr1/5R1q/5npP/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rg3
      • 2.Rxd4#
    • 1...Rh4
      • 2.Rxd4#
  • Tries
    • 1.Sxg5+?
      • 1...Bxg5
        • 2.Qd5#
      • 1...Rxg5+!
    • 1.Qxf4+?
      • 1...Rxf4
        • 2.Rxd4#
      • 1...gxf4!
    • 1.Qe7?
      • threat
        • 2.Sxg5#
      • 1...Kxf3
        • 2.Sxd4#
        • 2.Sxg5#
      • 1...Qxf3
        • 2.Sc5#
      • 1...Rg3
        • 2.Rxd4#
      • 1...Rh4
        • 2.Rxd4#
      • 1...Bxe7!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Sxg5#
      • 1...Kxf3
        • 2.Sxd4#
      • 1...Qxf3
        • 2.Sc5#
      • 1...Rg3
        • 2.Rxd4#
      • 1...Rh4
        • 2.Rxd4#
      • 1...Be7
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(g);P_PINS(E)::R1(D),XP(d)
  • Tries
    • Try
      • S(E);CHECK,XP(h)
      • Vars
        • B(i);XS(E)::QAB1(H)
      • Refutation
        • R(g);CHECK,XS(E)
    • Try
      • Q(H);CHECK,XP(f)
      • Vars
        • R(g);P_PINS(E),XQ(H)::R1(D),XP(d)
      • Refutation
        • P(h);XQ(H)
    • Try
      • Q(H);
      • Threat
        • QAR(H)+S(E),DCHECK,XP(h)
      • Vars
        • Q(c);SBLOCK,XR(B)::QAR(H)+S(E),DCHECK
        • R(g);P_PINS(E)::R1(D),XP(d)
      • Refutation
        • B(i);XQ(H)
  • Actual
    • Q(H);
    • Threat
      • QAR(H)+S(E),DCHECK,XP(h)
    • Vars
      • K(e);P_SPINR(g),S_FLIGHT,XR(B)::S(E),XP(d)
      • Q(c);SBLOCK,XR(B)::QAR(H)+S(E),DCHECK
      • R(g);P_PINS(E)::R1(D),XP(d)
      • B(i);OGATE::QAB(H)
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