MESON Chess Problem Database

Problem Display
PID: 7627 (8/3KB3/4p2p/4k1n1/2PR4/1P2b3/6QP/1B6 w - - 0 1)

Rychkov, Vladimir Nikolaevich

5th Prize, Chernobilya, 1992

8/3KB3/4p2p/4k1n1/2PR4/1P2b3/6QP/1B6

#2

8 + 5

3705 Album Russia (1992-1994) 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qb2#
    • 1...Bxd4
      • 2.Qg3#
    • 1...Sf3
      • 2.Qg7#
    • 1...Sh3
      • 2.Qe4#
      • 2.Qg7#
    • 1...Se4
      • 2.Qxe4#
    • 1...Sf7
      • 2.Qe4#
      • 2.Qg7#
    • 1...Sh7
      • 2.Qe4#
  • Tries
    • 1.Bd6+?
      • 1...Kxd4
        • 2.Qb2#
      • 1...Kf6!
    • 1.Re4+?
      • 1...Sxe4
        • 2.Qxe4#
      • 1...Kf5!
    • 1.Rf4?
      • threat
        • 2.Bd6#
      • 1...Kxf4
        • 2.Qg3#
      • 1...Bxf4
        • 2.Qb2#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sf7
        • 2.Qe4#
      • 1...Bc5!
    • 1.Rd5+?
      • 1...Kf4
        • 2.Qg3#
      • 1...exd5!
    • 1.Qc6?
      • threat
        • 2.Qc5#
        • 2.Qd6#
      • 1...Bxd4
        • 2.Qd6#
        • 2.Qc7#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sf7
        • 2.Qe4#
        • 2.Qc5#
      • 1...Kxd4!
    • 1.Qf2?
      • threat
        • 2.Bf6#
        • 2.Qf6#
      • 1...Kxd4
        • 2.Qb2#
      • 1...Bf4
        • 2.Qxf4#
      • 1...Sf3
        • 2.Qxe3#
      • 1...Se4
        • 2.Rxe4#
      • 1...Sh7
        • 2.Re4#
        • 2.Qxe3#
      • 1...Bxf2!
    • 1.Qg3+?
      • 1...Bf4
        • 2.Qxf4#
      • 1...Kxd4!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qh8#
      • 1...Kxd4
        • 2.Qa1#
      • 1...Bxd4
        • 2.Qb8#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sf7
        • 2.Qe4#
      • 1...Sh7
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(b);OGATEB,S_FLIGHT,XR(F)::QAB(B)
    • B(a);N_GUARD,SBLOCK,XR(F)::QAB(B)
    • S(c);OGATE::QAB(B)
    • S(c);N_GUARD::QAR1(B),XS(c)
    • S(c);N_GUARD::QAR1(B)
  • Tries
    • Try
      • B(H);CHECK
      • Vars
        • K(b);S_FLIGHT,XR(F)::QAB(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • S(c);OGATE,XR(F)::QAR1(B),XS(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(F);
      • Threat
        • B(H)
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(F)::QAB1(B)
        • B(a);N_GUARD,SBLOCK,XR(F)::QAB(B)
        • S(c);N_GUARD::QAR1(B),XS(c)
        • S(c);N_GUARD::QAR1(B)
      • Refutation
        • B(a);
    • Try
      • R(F);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
      • Refutation
        • P(d);XR(F)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);N_GUARD::QAR1(B),XS(c)
      • Refutation
        • K(b);S_FLIGHT,XR(F)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);OGATEB,P_SPINB(a),S_FLIGHT,XR(F)::QAB(B)
        • B(a);N_GUARD::QAB1(B),XB(a)
        • S(c);N_GUARD::QAR2(B),XB(a)
        • S(c);N_GUARD::R1(F),XS(c)
      • Refutation
        • B(a);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB1(B),XB(a)
      • Refutation
        • K(b);S_FLIGHT,XR(F)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(F)::QAB(B)
      • B(a);SBLOCK,XR(F)::QAB(B)
      • S(c);N_GUARD::QAR1(B),XS(c)
      • S(c);N_GUARD::QAR1(B)
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