MESON Chess Problem Database

Problem Display
PID: 75450 (3K2b1/5p2/1R3R2/1P2kN1n/2PN3P/5P2/1qpQ4/2r1r3 w - - 0 1)

Shanshin, Valery Yurevich

Vasilenko, Anatoly Grigorovich

4th HM., Rudenko-60 JT, 1998

3K2b1/5p2/1R3R2/1P2kN1n/2PN3P/5P2/1qpQ4/2r1r3

#2

10 + 8

6166 FIDE Album (1998-2000) 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4+
      • 2.Qxd4#
    • 1...Rd1
      • 2.Qe3#
    • 1...Rf1
      • 2.Qe3#
    • 1...Rg1
      • 2.Qe3#
    • 1...Rh1
      • 2.Qe3#
    • 1...Re3
      • 2.Qxe3#
    • 1...Sxf6
      • 2.Qh2#
    • 1...Sg7
      • 2.Qh2#
  • Tries
    • 1.Rbd6?
      • threat
        • 2.Sc6#
      • 1...Qxd4
        • 2.Qxd4#
      • 1...Sxf6
        • 2.Qh2#
      • 1...Re3
        • 2.Qxe3#
      • 1...Qxb5!
    • 1.Qxe1+?
      • 1...Kf4
        • 2.Qe3#
        • 2.Qe4#
      • 1...Rxe1!
    • 1.Qg5?
      • threat
        • 2.Sc6#
      • 1...Qxd4+
        • 2.Sd6#
      • 1...Qxb5
        • 2.Rxb5#
      • 1...Sxf6
        • 2.Qg3#
      • 1...Red1
        • 2.Qe3#
      • 1...Rcd1!
    • 1.Qh2+?
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf4!
    • 1.f4+?
      • 1...Ke4
        • 2.Sd6#
      • 1...Sxf4!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Rf5#
      • 1...Kxf6
        • 2.Qg5#
      • 1...Qxd4
        • 2.Qg5#
      • 1...Sxf6
        • 2.f4#
      • 1...Bh7
        • 2.Sxf7#
      • 1...Sg3
        • 2.Qf4#
      • 1...Sg7
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(c);CHECK,OGATE,XS(D)::QAB1(A),XQ(c)
    • R(b);N_GUARD::QAR2(A)
    • R(b);N_GUARD::QAR2(A),XR(b)
    • S(f);N_GUARD,XR(I)::QAB(A)
    • S(f);N_GUARD::QAB(A)
  • Tries
    • Try
      • R(H);
      • Threat
        • S(D)
      • Vars
        • Q(c);OGATE,P_PINR(H),XS(D)::QAB1(A),XQ(c)
        • S(f);N_GUARD,XR(I)::QAB(A)
        • R(b);N_GUARD::QAR2(A),XR(b)
      • Refutation
        • Q(c);XP(F)
    • Try
      • Q(A);CHECK,XR(b)
      • Refutation
        • R(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • S(D)
      • Vars
        • Q(c);CHECK,SBLOCK,XS(D)::QAR(A)+S(G)
        • Q(c);OGATE,XP(F)::R(H),XQ(c)
        • S(f);N_GUARD,XR(I)::QAB(A)
        • R(b);N_GUARD,P_PINS(D)::QAR2(A)
      • Refutation
        • R(a);P_PINS(D)
    • Try
      • Q(A);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAB(A),XS(f)
      • Refutation
        • S(f);P_SPINS(f)
    • Try
      • P(B);CHECK
      • Vars
        • K(e);P-FLIGHT::S(G)
      • Refutation
        • S(f);XP(B)
  • Actual
    • S(G);
    • Threat
      • R1(I)
    • Vars
      • K(e);S_FLIGHT,XR(I)::QAB1(A)
      • Q(c);P_PINS(G),SBLOCK,XS(D)::QAR2(A)
      • S(f);N_GUARD,SBLOCK,XR(I)::P(B)
      • B(h);N_GUARD::S(G),XP(g)
      • S(f);N_GUARD::QAB1(A)
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