MESON Chess Problem Database

Problem Display
PID: 93900 (8/8/2rp2p1/N1p3B1/1pBkN2p/5P2/7Q/4b2K w - - 0 1)

van Dijk, Johannes

Ceske listy sachove, 1900

8/8/2rp2p1/N1p3B1/1pBkN2p/5P2/7Q/4b2K

#2

7 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc7
      • 2.Qxd6#
    • 1...Rc8
      • 2.Qxd6#
    • 1...Bg3
      • 2.Qb2#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Se2#
        • 2.Sb5#
      • 1...Kxc3
        • 2.Bf6#
      • 1...Bxc3
        • 2.Qf4#
      • 1...bxc3
        • 2.Qf4#
      • 1...Rb6
        • 2.Se2#
      • 1...Bg3!
    • 1.Qg1+?
      • 1...Bf2
        • 2.Qa1#
      • 1...Ke5!
    • 1.Qf4?
      • threat
        • 2.Bf6#
        • 2.Qf6#
      • 1...Bg3
        • 2.Bf6#
      • 1...d5!
    • 1.Qd2+?
      • 1...Ke5
        • 2.Qd5#
      • 1...Bxd2!
    • 1.Qe2?
      • threat
        • 2.Sxc6#
        • 2.Bf6#
      • 1...Ra6
        • 2.Bf6#
      • 1...Rb6
        • 2.Bf6#
      • 1...Rc7
        • 2.Bf6#
      • 1...Rc8
        • 2.Bf6#
      • 1...Bg3
        • 2.Sxc6#
        • 2.Qb2#
      • 1...d5
        • 2.Sxc6#
      • 1...Ke5!
  • Keys
    • 1.Sg3!
      • threat
        • 2.Se2#
      • 1...Kc3
        • 2.Bf6#
      • 1...Ke5
        • 2.Sxc6#
      • 1...Bxg3
        • 2.Qb2#
      • 1...hxg3
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(f);N_GUARD::QAR2(B),XP(g)
    • B(a);N_GUARD::QAB(B)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);S_FLIGHT,XS(E)::B(G)
        • B(a);SBLOCK,XS(E)::QAR2(B)
        • P(b);SBLOCK,XS(E)::QAR2(B)
        • R(f);::S(E)
      • Refutation
        • B(a);
    • Try
      • Q(B);CHECK
      • Vars
        • B(a);OGATE,P_SPINB(a)::QAB(B)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::B(G)
      • Refutation
        • P(g);
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • B(a);XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(f);::B(G)
        • P(g);::S(F),XR(f)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(c);S_FLIGHT::B(G)
      • K(c);S_FLIGHT::S(F),XR(f)
      • B(a);N_GUARD,XS(E)::QAB(B)
      • P(d);OGATE,XS(E)::QAB(B)
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