MESON Chess Problem Database

Problem Display
PID: 89809 (8/p1Q4q/P2P4/3P4/4B1P1/5R2/1K2P1k1/7R w - - 0 1)

Forster, Klaus

Die Schwalbe, 1998

8/p1Q4q/P2P4/3P4/4B1P1/5R2/1K2P1k1/7R

#2

10 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qb6?
      • threat
        • 2.Qg1#
      • 1...Qg7+
        • 2.Rc3#
      • 1...Qh8+
        • 2.Rc3#
      • 1...Kxh1
        • 2.Rh3#
      • 1...Qxh1
        • 2.Qf2#
      • 1...Qh2
        • 2.Ra3#
        • 2.Rb3#
        • 2.Rc3#
        • 2.Rd3#
      • 1...Qb7
        • 2.Ra3#
        • 2.Rb3#
        • 2.Rc3#
        • 2.Rd3#
        • 2.Rfh3#
      • 1...axb6!
    • 1.Qxa7?
      • threat
        • 2.Qg1#
      • 1...Qb7+
        • 2.Rb3#
      • 1...Qg7+
        • 2.Rc3#
      • 1...Qh8+
        • 2.Rc3#
      • 1...Kxh1
        • 2.Rh3#
      • 1...Qxh1
        • 2.Qf2#
      • 1...Qh2
        • 2.Ra3#
        • 2.Rb3#
        • 2.Rc3#
        • 2.Rd3#
      • 1...Qxa7!
    • 1.d7?
      • threat
        • 2.Rf5#
      • 1...Qg7+
        • 2.Rf6#
      • 1...Qh8+
        • 2.Rf6#
      • 1...Kxh1
        • 2.Rf1#
      • 1...Qxe4
        • 2.Qh2#
      • 1...Qxh1
        • 2.Qg3#
      • 1...Qf5
        • 2.Rxf5#
        • 2.Qh2#
      • 1...Qh2
        • 2.Qxh2#
      • 1...Qe7
        • 2.Qh2#
      • 1...Qh3!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qg1#
      • 1...Qb7+
        • 2.Rb3#
      • 1...Qg7+
        • 2.Rc3#
      • 1...Qh8+
        • 2.Rc3#
      • 1...Kxh1
        • 2.Rh3#
      • 1...Qxh1
        • 2.Qf2#
      • 1...Qh2
        • 2.Ra3#
        • 2.Rb3#
        • 2.Rc3#
        • 2.Rd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(J);
      • Threat
        • QAR1(J)
      • Vars
        • Q(c);CHECK,N_GUARD::B(E)+R(D)
        • K(a);S_FLIGHT,XR(A)::B(E)+R(D),DCHECK
        • Q(c);SBLOCK,XR(A)::QAR1(J)
      • Refutation
        • P(b);XQ(J)
    • Try
      • Q(J);XP(b)
      • Threat
        • QAR1(J)
      • Vars
        • Q(c);CHECK,N_GUARD::B(E)+R(D)
        • K(a);S_FLIGHT,XR(A)::B(E)+R(D),DCHECK
        • Q(c);SBLOCK,XR(A)::QAR1(J)
      • Refutation
        • Q(c);XQ(J)
    • Try
      • P(I);
      • Threat
        • B(E)+R(D)
      • Vars
        • Q(c);CHECK,N_GUARD::B(E)+R(D)
        • K(a);S_FLIGHT,XR(A)::B(E)+R(D),DCHECK
        • Q(c);N_GUARD,XB(E)::QAR1(J)
        • Q(c);SBLOCK,XR(A)::QAR1(J)
        • Q(c);N_GUARD::QAR1(J),XQ(c)
        • Q(c);N_GUARD::QAR1(J)
      • Refutation
        • Q(c);
  • Actual
    • Q(J);
    • Threat
      • QAR1(J)
    • Vars
      • Q(c);CHECK,N_GUARD::B(E)+R(D)
      • K(a);S_FLIGHT,XR(A)::B(E)+R(D),DCHECK
      • Q(c);SBLOCK,XR(A)::QAR1(J)
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