MESON Chess Problem Database

Problem Display
PID: 174522 (K3N3/4pBpq/2Q1N2p/1pp1kbPR/3pP3/2n2R2/5n2/4B3 w - - 0 1)

Volchek, Viktor Fedorovich

1st Comm., Ovechkina MT, 2001

K3N3/4pBpq/2Q1N2p/1pp1kbPR/3pP3/2n2R2/5n2/4B3

#2

10 + 11

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qg8
      • 2.Rxf5#
    • 1...Qh8
      • 2.Rxf5#
    • 1...Bxe6
      • 2.Qxe6#
    • 1...Sfd1
      • 2.Bg3#
    • 1...Sg4
      • 2.Bg3#
    • 1...Sb1
      • 2.Qd5#
    • 1...Scd1
      • 2.Qd5#
    • 1...Sa2
      • 2.Qd5#
    • 1...Se2
      • 2.Qd5#
    • 1...Sa4
      • 2.Qd5#
    • 1...Sd5
      • 2.Qxd5#
    • 1...d3
      • 2.Bxc3#
  • Tries
    • 1.Sxc5?
      • threat
        • 2.Qc7#
      • 1...Bxe4
        • 2.Sd7#
      • 1...Sfxe4
        • 2.Sd3#
      • 1...Scxe4
        • 2.Qd5#
      • 1...d3
        • 2.Bxc3#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Qg6!
    • 1.Bxf2?
      • threat
        • 2.Bg3#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Se2
        • 2.Qd5#
      • 1...Sxe4!
    • 1.Qxc5+?
      • 1...Sd5
        • 2.Qxd4#
        • 2.Qxd5#
      • 1...Kxe4!
    • 1.g6?
      • threat
        • 2.Rfxf5#
        • 2.Rhxf5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Qxg6!
  • Keys
    • 1.Re3!
      • threat
        • 2.Qc7#
      • 1...Bxe4
        • 2.g6#
      • 1...Sfxe4
        • 2.Bg3#
      • 1...Scxe4
        • 2.Qxc5#
      • 1...dxe3
        • 2.Bxc3#
      • 1...Sd5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 11
  • Sets
    • Q(k);N_GUARD,P_PINS(J)::R1(B),XB(g)
    • B(g);OGATE,XS(G)::QAR1(F),XB(g)
    • S(a);OGATE::B(A)
    • S(b);N_GUARD::QAR1(F)
    • S(b);N_GUARD::QAR1(F),XS(b)
    • P(c);OGATEB::B(A),XS(b)
  • Tries
    • Try
      • S(G);XP(e)
      • Threat
        • QAB(F)
      • Vars
        • B(g);N_GUARD,P_PINQ(F),XP(C)::S(G)
        • S(a);N_GUARD,XP(C)::S(G)
        • S(b);N_GUARD,XP(C)::QAR1(F)
        • P(c);OGATEB::B(A),XS(b)
        • S(b);N_GUARD::QAR1(F),XS(b)
      • Refutation
        • Q(k);
    • Try
      • B(A);XS(a)
      • Threat
        • B(A)
      • Vars
        • S(b);N_GUARD::QAR1(F),XS(b)
        • S(b);N_GUARD::QAR1(F)
      • Refutation
        • S(b);XP(C)
    • Try
      • Q(F);CHECK,XP(e)
      • Refutation
        • K(f);P-FLIGHT,XP(C)
    • Try
      • P(D);P_PINB(g)
      • Threat
        • DUALS(2)
      • Vars
        • S(b);N_GUARD::QAR1(F),XS(b)
      • Refutation
        • Q(k);XP(D)
  • Actual
    • R(B);
    • Threat
      • QAB(F)
    • Vars
      • B(g);P_PINQ(F),P_SPINB(g),XP(C)::R(E)+P(D)
      • S(a);OGATE,P_SPINS(a),XP(C)::B(A)
      • S(b);N_GUARD,P_SPINS(b),XP(C)::QAR2(F),XP(e)
      • P(c);OGATEB,XR(B)::B(A),XS(b)
      • S(b);N_GUARD::QAR1(F),XS(b)
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