MESON Chess Problem Database

Problem Display
PID: 79174 (6bK/B7/1N3QB1/2r4p/1prPP2N/1Rb1knP1/2Ppn1R1/8 w - - 0 1)

Gavrilov, Constantin Grigorievich

Szachista, 1939

6bK/B7/1N3QB1/2r4p/1prPP2N/1Rb1knP1/2Ppn1R1/8

#2

12 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4
      • 2.Qxf3#
    • 1...Rd5
      • 2.Sxc4#
    • 1...Sexd4
      • 2.Qf4#
    • 1...Se1
      • 2.Qf2#
    • 1...Sg1
      • 2.Qf2#
    • 1...Sh2
      • 2.Qf2#
    • 1...Sfxd4
      • 2.Qf2#
    • 1...Sxh4
      • 2.Qf2#
    • 1...Se5
      • 2.Qf2#
    • 1...Sg5
      • 2.Qf2#
  • Tries
    • 1.Sf5+?
      • 1...Kxe4
        • 2.Rxe2#
      • 1...Rxf5!
    • 1.Sxc4+?
      • 1...Rxc4
        • 2.Qxf3#
      • 1...Bxc4!
    • 1.Sd5+?
      • 1...Rxd5
        • 2.Qxf3#
      • 1...Bxd5!
    • 1.Qf4+?
      • 1...Kxd4
        • 2.Sxf3#
      • 1...Sxf4!
  • Keys
    • 1.d5!
      • threat
        • 2.Sxc4#
      • 1...Rxe4
        • 2.Sf5#
      • 1...Bxd5
        • 2.Sxd5#
      • 1...Se5
        • 2.Qf2#
      • 1...Rd4
        • 2.Qxf3#
      • 1...Sed4
        • 2.Qf4#
      • 1...Sfd4
        • 2.Qf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(g);SBLOCK,XP(E)::QAR1(I),XS(e)
    • R(h);N_GUARD,S_CUTB(j)::S(H),XR(g)
    • S(b);N_GUARD,SBLOCK,XP(E)::QAB1(I)
    • S(e);OGATE::QAB1(I)
    • S(e);OGATE,SBLOCK,XP(E)::QAB1(I)
    • S(e);OGATE,XS(G)::QAB1(I)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(d);N_SPINB(c),P-FLIGHT,XP(F)::R(B),XS(b)
      • Refutation
        • R(h);XS(G)
    • Try
      • S(H);CHECK,XR(g)
      • Vars
        • R(h);XS(H)::QAR1(I),XS(e)
      • Refutation
        • B(j);XS(H)
    • Try
      • S(H);CHECK
      • Vars
        • R(h);XS(H)::QAR1(I),XS(e)
      • Refutation
        • B(j);XS(H)
    • Try
      • Q(I);CHECK,P_SPINP(E)
      • Vars
        • K(d);N_SPINB(c),S_FLIGHT,XP(E)::S(G),XS(e)
      • Refutation
        • S(b);XQ(I)
  • Actual
    • P(E);P_SPINQ(I)
    • Threat
      • S(H),XR(g)
    • Vars
      • R(g);SBLOCK,XP(F)::S(G)
      • B(j);XP(E)::S(H),XB(j)
      • S(e);N_PINQ(I)::QAB1(I)
      • R(g);N_PINQ(I),SBLOCK::QAR1(I),XS(e)
      • S(b);N_PINQ(I),SBLOCK::QAB1(I)
      • S(e);N_PINQ(I),SBLOCK::QAB1(I)
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