MESON Chess Problem Database

Problem Display
PID: 59415 (1b6/3pK3/2ppRB2/1prk4/6Q1/2npp1p1/2n5/4r3 w - - 0 1)

Dyachuk, Vasyl Vasilovich

3rd Prize, Shakhmatnaya kompozitsiya, 2000

1b6/3pK3/2ppRB2/1prk4/6Q1/2npp1p1/2n5/4r3

#2

4 + 13

23 Die Schwalbe 2005
5454 Near Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.Qf5#
      • 2.Qh5#
      • 2.Qg5#
    • 1...Ba7
      • 2.Rxd6#
    • 1...Sa1
      • 2.Qd4#
    • 1...Sa3
      • 2.Qd4#
    • 1...Sb4
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
    • 1...Sb1
      • 2.Qe4#
    • 1...Sd1
      • 2.Qe4#
    • 1...Sa2
      • 2.Qe4#
    • 1...Se2
      • 2.Qe4#
    • 1...Sa4
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
    • 1...dxe6
      • 2.Qxe6#
  • Tries
    • 1.Bxc3?
      • threat
        • 2.Qe4#
      • 1...dxe6
        • 2.Qxe6#
      • 1...Rc4
        • 2.Qf5#
        • 2.Qh5#
        • 2.Qg5#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Rxc3!
    • 1.Rxe3?
      • threat
        • 2.Qg8#
      • 1...Sxe3
        • 2.Qd4#
      • 1...Rc4
        • 2.Qf5#
        • 2.Qh5#
        • 2.Qg5#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Rxe3+!
    • 1.Re4?
      • threat
        • 2.Qf5#
      • 1...Sxe4
        • 2.Qg8#
      • 1...Sd4
        • 2.Rxd4#
      • 1...Rf1!
    • 1.Qf3+?
      • 1...Se4
        • 2.Qxe4#
      • 1...Kc4!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Rxe3#
      • 1...Kc4
        • 2.Re4#
      • 1...dxe6
        • 2.Qxe6#
      • 1...Rc4
        • 2.Qg5#
      • 1...Sd4
        • 2.Re5#
      • 1...Se4
        • 2.Rxd6#
      • 1...e2
        • 2.Rxe2#
        • 2.Re3#

Anticipated by 67420(1994-1995)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • B(m);N_GUARD::R1(B),XP(k)
    • S(b);N_GUARD::QAR1(A)
    • S(b);N_GUARD::QAR1(A),XS(b)
    • S(c);N_GUARD::QAB1(A)
    • S(c);N_GUARD::QAB1(A),XS(c)
    • P(l);OGATE,XR(B)::QAB1(A),XP(l)
  • Tries
    • Try
      • B(C);XS(c)
      • Threat
        • QAB1(A)
      • Vars
        • P(l);OGATE,XR(B)::QAB1(A),XP(l)
        • S(b);N_GUARD::QAR1(A),XS(b)
      • Refutation
        • R(h);XB(C)
    • Try
      • R(B);P_SPINR(B),XP(e)
      • Threat
        • QAB(A)
      • Vars
        • S(b);N_GUARD,XR(B)::QAR1(A)
        • S(b);N_GUARD::QAR1(A),XS(b)
      • Refutation
        • R(a);CHECK,XR(B)
    • Try
      • R(B);
      • Threat
        • QAR2(A)
      • Vars
        • S(c);SBLOCK,XR(B)::QAB(A)
        • S(b);N_GUARD::R1(B),XS(b)
      • Refutation
        • R(a);
    • Try
      • Q(A);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB1(A),XS(c)
      • Refutation
        • K(i);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+R(B),XP(e)
    • Vars
      • K(i);S_FLIGHT::QAB(A)+R(B),DCHECK
      • P(l);OGATE,P_SPINP(l),XR(B)::QAB1(A),XP(l)
      • R(h);SBLOCK::QAR(A)
      • S(b);SBLOCK::QAB(A)+R(B),DCHECK
      • S(c);SBLOCK::QAB(A)+R(B),DCHECK,XP(k)
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