MESON Chess Problem Database

Problem Display
PID: 273708 (8/b2N3B/3N1p2/Q5Pp/3k2qR/pP1b4/5P1p/2nR2nK w - - 0 1)

Gavriliv, Evgeni M

Vasilenko, Anatoly Grigorovich

Schach, 2023

8/b2N3B/3N1p2/Q5Pp/3k2qR/pP1b4/5P1p/2nR2nK

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4+
      • 2.Rxe4#
    • 1...Qf4
      • 2.Rxf4#
    • 1...Bc5
      • 2.Qxc5#
    • 1...Bb8
      • 2.Qc5#
    • 1...Sa2
      • 2.Rxd3#
    • 1...Sce2
      • 2.Rxd3#
    • 1...Sxb3
      • 2.Rxd3#
    • 1...fxg5
      • 2.Qe5#
    • 1...f5
      • 2.Qe5#
  • Tries
    • 1.Sxf6?
      • threat
        • 2.Sf5#
      • 1...Qe4+
        • 2.Rxe4#
      • 1...Sxb3
        • 2.Rxd3#
      • 1...Bc5!
    • 1.Sf8?
      • threat
        • 2.Se6#
      • 1...Qe4+
        • 2.Rxe4#
      • 1...Bc5!
    • 1.Bxd3?
      • threat
        • 2.Sf5#
      • 1...Qe4+
        • 2.Rxe4#
      • 1...Bc5
        • 2.Qxc5#
      • 1...f5
        • 2.Sxf5#
        • 2.Qe5#
      • 1...Sxd3!
    • 1.Bg8?
      • threat
        • 2.Qb4#
      • 1...Qe4+
        • 2.Rxe4#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Sa2!
    • 1.gxf6?
      • threat
        • 2.Qe5#
      • 1...Qe4+
        • 2.Rxe4#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Sf3!
  • Keys
    • 1.Be4!
      • threat
        • 2.Qb4#
      • 1...Qf3+
        • 2.Bxf3#
      • 1...Qg2+
        • 2.Bxg2#
      • 1...Qxe4+
        • 2.Rxe4#
      • 1...Qxd1
        • 2.Sf5#
      • 1...Qxd7
        • 2.Bf5#
      • 1...Qe6
        • 2.Sb5#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Sa2
        • 2.Rxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • Q(g);CHECK,OGATE::R1(E),XQ(g)
    • Q(g);OGATE::R(E),XQ(g)
    • B(j);N_GUARD::QAB1(F),XB(j)
    • B(j);N_GUARD::QAB1(F)
    • S(a);N_GUARD::R1(A),XB(e)
    • S(a);N_GUARD,XP(D)::R1(A),XB(e)
    • P(i);N_GUARD,XP(G)::QAB1(F)
    • P(i);N_GUARD::QAB1(F)
  • Tries
    • Try
      • S(I);XP(i)
      • Threat
        • S(H)
      • Vars
        • Q(g);CHECK,OGATE::R1(E),XQ(g)
        • S(a);N_GUARD,XP(D)::R1(A),XB(e)
      • Refutation
        • B(j);
    • Try
      • S(I);
      • Threat
        • S(I)
      • Vars
        • Q(g);CHECK,OGATE::R1(E),XQ(g)
      • Refutation
        • B(j);
    • Try
      • B(J);XB(e)
      • Threat
        • S(H)
      • Vars
        • Q(g);CHECK,OGATE::R1(E),XQ(g)
        • B(j);N_GUARD::QAB1(F),XB(j)
      • Refutation
        • S(a);P_SPINS(a),XB(J)
    • Try
      • B(J);
      • Threat
        • QAR2(F)
      • Vars
        • Q(g);CHECK,OGATE::R1(E),XQ(g)
        • B(j);N_GUARD::QAB1(F),XB(j)
      • Refutation
        • S(a);
    • Try
      • P(G);XP(i)
      • Threat
        • QAB1(F)
      • Vars
        • Q(g);CHECK,OGATE::R1(E),XQ(g)
        • B(j);N_GUARD::QAB1(F),XB(j)
      • Refutation
        • S(b);
  • Actual
    • B(J);N_PINQ(g)
    • Threat
      • QAR2(F)
    • Vars
      • Q(g);CHECK,OGATEB::R(E)+B(J),XQ(g)
      • Q(g);CHECK,OGATE,P_SPINQ(g),XB(J)::R1(E),XQ(g)
      • Q(g);N_GUARD,N_SPINB(e),XR(A)::S(H)
      • Q(g);OGATEB,XS(I)::R(E)+B(J)
      • Q(g);::S(H)
      • B(j);N_GUARD::QAB1(F),XB(j)
      • S(a);N_GUARD::R1(A),XB(e)
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