MESON Chess Problem Database

Problem Display
PID: 192269 (1K6/4b1PQ/2p1Rp2/R1Nkp3/2p1N1q1/2P3P1/8/8 w - - 0 1)

Fomichev, Evgeny Vasilevich

Sachsische Zeitung, 2001

(First published on Sat Mar 31 2001)

1K6/4b1PQ/2p1Rp2/R1Nkp3/2p1N1q1/2P3P1/8/8

#2

9 + 7

16210 Problemschach-Jahrbuch (2001) 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Qxe4#
    • 1...Bxc5
      • 2.Rd6#
    • 1...Bd6+
      • 2.Rxd6#
    • 1...Bd8
      • 2.Rd6#
    • 1...Bf8
      • 2.Sxf6#
  • Tries
    • 1.Sa6+?
      • 1...Bc5
        • 2.Sc7#
        • 2.Rd6#
      • 1...c5
        • 2.Sc7#
      • 1...Kxe6!
    • 1.Qh1?
      • threat
        • 2.Sxf6#
      • 1...Bd6+
        • 2.Rxd6#
      • 1...Qxe6
        • 2.Qd1#
      • 1...Qxe4
        • 2.Qxe4#
      • 1...Bxc5
        • 2.Rd6#
      • 1...f5
        • 2.Sf6#
      • 1...Qf3!
    • 1.g8Q?
      • threat
        • 2.Rd6#
      • 1...Bd6+
        • 2.Rxd6#
      • 1...Qxe6
        • 2.Qxe6#
      • 1...Qxe4
        • 2.Rxf6#
        • 2.Qxe4#
      • 1...Qxg8+!
    • 1.g8B?
      • threat
        • 2.Rd6#
      • 1...Bd6+
        • 2.Rxd6#
      • 1...Qxe6
        • 2.Bxe6#
      • 1...Qxe4
        • 2.Rxf6#
        • 2.Qxe4#
      • 1...Qxg8+!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Rd6#
      • 1...Bd6+
        • 2.Rxd6#
      • 1...Qxe6
        • 2.Qxe6#
      • 1...Qxe4
        • 2.Rxf6#
      • 1...Bxc5
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(b);OGATE,XS(C)::QAB1(H),XQ(b)
    • B(g);N_GUARD,P_SPINB(g),XS(E)::R1(F)
    • B(g);CHECK,N_GUARD::R1(F),XB(g)
    • B(g);N_GUARD::R1(F)
    • B(g);N_GUARD::S(C),XP(f)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • P(e);P_SPINP(e)::S(E)
      • Refutation
        • K(c);S_FLIGHT,XR(F)
    • Try
      • Q(H);
      • Threat
        • QAB(H)+S(C),DCHECK,XP(f)
      • Vars
        • B(g);CHECK,N_GUARD::R1(F),XB(g)
        • Q(b);N_GUARD,XR(F)::QAR(H)
        • Q(b);OGATE,P_SPINQ(b),XS(C)::QAB1(H),XQ(b)
        • B(g);N_GUARD,P_SPINB(g),XS(E)::R1(F)
        • P(f);::QAB(H)+S(C),DCHECK
      • Refutation
        • Q(b);
    • Try
      • P(G);
      • Threat
        • QAB(G)+R(F),DCHECK
      • Vars
        • B(g);CHECK::QAB(G)+R(F),DCHECK,XB(g)
        • Q(b);OGATE,P_SPINQ(b),XR(F)::QAB1(G),XQ(b)
      • Refutation
        • Q(b);CHECK,XQ(G)
    • Try
      • P(G);
      • Threat
        • B(G)+R(F),DCHECK
      • Vars
        • B(g);CHECK::B(G)+R(F),DCHECK,XB(g)
        • Q(b);OGATE,P_SPINQ(b),XR(F)::B(G),XQ(b)
      • Refutation
        • Q(b);CHECK,XB(G)
  • Actual
    • Q(H);
    • Threat
      • QAB(H)+R(F),DCHECK
    • Vars
      • B(g);CHECK::QAB(H)+R(F),DCHECK,XB(g)
      • Q(b);OGATE,P_SPINQ(b),XR(F)::QAB1(H),XQ(b)
      • Q(b);N_GUARD,XS(C)::QAB(H)+R(F),XP(f)
      • B(g);N_GUARD,P_SPINB(g),XS(E)::S(C),XP(f)
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