MESON Chess Problem Database

Problem Display
PID: 75119 (8/8/8/b7/p4Q2/3N2p1/1P4r1/1KNkn2R w - - 0 1)

Maleika, Gerhard

Die Schwalbe, 2007

8/8/8/b7/p4Q2/3N2p1/1P4r1/1KNkn2R

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb2+
      • 2.Sxb2#
    • 1...Rd2
      • 2.Rxe1#
    • 1...Bd2
      • 2.Qxa4#
    • 1...Bb6
      • 2.Rxe1#
    • 1...Bc7
      • 2.Rxe1#
    • 1...Bd8
      • 2.Rxe1#
  • Tries
    • 1.Qf3+?
      • 1...Re2
        • 2.Qxe2#
      • 1...Kd2!
    • 1.Qxa4+?
      • 1...Rc2
        • 2.Qxc2#
      • 1...Kd2!
    • 1.Qg4+?
      • 1...Re2
        • 2.Qxe2#
      • 1...Kd2!
  • Keys
    • 1.Qd4!
      • threat
        • 2.Sf2#
      • 1...Rxb2+
        • 2.Sxb2#
      • 1...Kd2
        • 2.Sxe1#
      • 1...Rd2
        • 2.Rxe1#
      • 1...Rf2
        • 2.Sxf2#
      • 1...Bd2
        • 2.Qxa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(c);CHECK,XP(D)::S(E),XR(c)
    • R(c);S_CUTB(f)::R1(C),XS(b)
    • B(f);SBLOCK,S_CUTR(c)::QAB(F),XP(e)
    • B(f);N_GUARD::R1(C),XS(b)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAB1(F),XR(c)
      • Refutation
        • K(a);N_SPINS(b),P-FLIGHT
    • Try
      • Q(F);CHECK,XP(e)
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAB1(F),XR(c)
      • Refutation
        • K(a);N_SPINS(b),P-FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAB1(F),XR(c)
      • Refutation
        • K(a);N_SPINS(b),P-FLIGHT
  • Actual
    • Q(F);
    • Threat
      • QAR(F)+S(E),DCHECK
    • Vars
      • R(c);CHECK,XP(D)::QAR(F)+S(E),DCHECK,XR(c)
      • K(a);N_SPINS(b),P-FLIGHT::QAR(F)+S(E),XS(b)
      • R(c);SBLOCK,S_CUTB(f)::R1(C),XS(b)
      • R(c);::QAR(F)+S(E),DCHECK,XR(c)
      • B(f);SBLOCK,S_CUTR(c)::QAB(F),XP(e)
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