MESON Chess Problem Database

Problem Display
PID: 78954 (7B/nBnK1Q1b/p1rP3p/5P2/2pNkPN1/8/2PPr1P1/3qRR2 w - - 0 1)

Shanshin, Valery Yurevich

1st Prize, Probleemblad, 2000

7B/nBnK1Q1b/p1rP3p/5P2/2pNkPN1/8/2PPr1P1/3qRR2

#2

14 + 10

102 Probleemblad 2007
102 Probleemblad 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Rxe2#
    • 1...Qb1
      • 2.Rxe2#
    • 1...Qc1
      • 2.Rxe2#
    • 1...Re3
      • 2.Rxe3#
    • 1...Bxf5+
      • 2.Qxf5#
    • 1...Sb5
      • 2.Qe6#
    • 1...Sd5
      • 2.Qe6#
    • 1...Se6
      • 2.Qxe6#
    • 1...Sa8
      • 2.Qe6#
    • 1...Se8
      • 2.Qe6#
  • Tries
    • 1.Sxe2?
      • threat
        • 2.Sc3#
        • 2.Sg3#
        • 2.Sf2#
      • 1...Qxc2
        • 2.Sc1#
        • 2.Sf2#
      • 1...Qxe2
        • 2.Rxe2#
      • 1...Qxe1
        • 2.Sc3#
      • 1...Qxd2
        • 2.Sc3#
        • 2.Sg3#
      • 1...Se6
        • 2.Sc3#
        • 2.Qxe6#
      • 1...c3
        • 2.Sxc3#
        • 2.Sg3#
        • 2.Sf2#
      • 1...Bxf5+!
    • 1.Bxc6+?
      • 1...Sd5
        • 2.Bxd5#
        • 2.Qxd5#
        • 2.Qe6#
        • 2.Qe8#
        • 2.Qe7#
      • 1...Sxc6!
    • 1.Rf3?
      • threat
        • 2.Sf2#
      • 1...Bxf5+
        • 2.Qxf5#
      • 1...Se6
        • 2.Qxe6#
      • 1...Qxe1!
    • 1.Qxc4?
      • threat
        • 2.Sf6#
      • 1...Bxf5+
        • 2.Se6#
      • 1...Sd5
        • 2.Qd3#
      • 1...Se8
        • 2.Qe6#
      • 1...Qxd2!
    • 1.Qe7+?
      • 1...Se6
        • 2.Qxe6#
      • 1...Kd5!
  • Keys
    • 1.Se6!
      • threat
        • 2.Sc5#
      • 1...Kd5
        • 2.Sf6#
      • 1...Bxf5
        • 2.Sf6#
      • 1...Sxe6
        • 2.Qxe6#
      • 1...Sd5
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(a);N_GUARD::R(A),XR(b)
    • R(b);OGATE::R1(A),XR(b)
    • B(j);CHECK,OGATE,XP(I)::QAB1(M),XB(j)
    • S(i);N_GUARD::QAR2(M)
    • S(i);N_GUARD::QAR2(M),XS(i)
  • Tries
    • Try
      • S(F);P_PINR(f),XR(b)
      • Threat
        • DUALS(3)
      • Vars
        • Q(a);OGATE,P_SPINQ(a),XS(F)::R(A),XQ(a)
        • Q(a);XR(A)::S(F)
      • Refutation
        • B(j);CHECK,XP(I)
    • Try
      • B(K);CHECK,XR(f)
      • Refutation
        • S(h);XB(K)
    • Try
      • R(B);
      • Threat
        • S(H)
      • Vars
        • B(j);CHECK,OGATE,XP(I)::QAB1(M),XB(j)
        • S(i);N_GUARD::QAR2(M),XS(i)
      • Refutation
        • Q(a);N_SPINR(b),P_SPINR(f),XR(A)
    • Try
      • Q(M);XP(c)
      • Threat
        • S(H)
      • Vars
        • B(j);CHECK,SBLOCK,XP(I)::QAR(M)+S(F)
        • S(i);SBLOCK::QAB1(M)
        • S(i);N_GUARD::QAR2(M)
      • Refutation
        • Q(a);XP(D)
    • Try
      • Q(M);CHECK
      • Vars
        • S(i);N_GUARD,P_SPINS(i)::QAR2(M),XS(i)
      • Refutation
        • K(d);N_SPINR(b),P_SPINR(f),S_FLIGHT
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(d);N_SPINR(b),P_SPINR(f),S_FLIGHT::S(H)
      • B(j);P_PINS(F),SBLOCK,XP(I)::S(H)
      • S(i);OGATE,XS(F)::QAR2(M),XS(i)
      • S(i);SBLOCK::S(H)
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