MESON Chess Problem Database

Problem Display
PID: 138293 (7n/4R3/5k1p/K2R1N2/5NqP/8/2p1Pr1n/5bQ1 w - - 0 1)

Shkolnikov, S

2nd Prize, Aleshin MT, 1947

7n/4R3/5k1p/K2R1N2/5NqP/8/2p1Pr1n/5bQ1

#2

8 + 8

14752 Soviet Chess Compositions (1945-1947) 1949

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe2
      • 2.Qg7#
    • 1...Qf3
      • 2.Qg7#
    • 1...Qh3
      • 2.Sh5#
      • 2.Qg7#
    • 1...Qxf5
      • 2.Qg7#
    • 1...Qh5
      • 2.Sxh5#
      • 2.Qg7#
    • 1...Qxf4
      • 2.Qg7#
    • 1...Qxh4
      • 2.Qg7#
    • 1...Qg7
      • 2.Sh5#
      • 2.Qxg7#
    • 1...Qg8
      • 2.Sh5#
    • 1...Rg2
      • 2.Qd4#
      • 2.Qb6#
    • 1...Rf3
      • 2.Qd4#
      • 2.Qb6#
    • 1...Rxf4
      • 2.Qb6#
    • 1...Bxe2
      • 2.Qa1#
    • 1...Bg2
      • 2.Qa1#
    • 1...Bh3
      • 2.Qa1#
    • 1...Sf7
      • 2.Re6#
  • Tries
    • 1.Sh5+?
      • 1...Qxh5
        • 2.Qg7#
      • 1...Kg6!
    • 1.Qxg4?
      • threat
        • 2.Sh5#
        • 2.Rd6#
        • 2.Qg7#
      • 1...Rxe2
        • 2.Sh5#
        • 2.Qg7#
      • 1...Rxf4
        • 2.Rd6#
        • 2.Qg7#
      • 1...Rg2
        • 2.Sh5#
        • 2.Rd6#
      • 1...Sg6
        • 2.Sh5#
        • 2.Rd6#
        • 2.Qxg6#
      • 1...Sf7
        • 2.Sh5#
        • 2.Re6#
        • 2.Qg6#
        • 2.Qg7#
      • 1...h5
        • 2.Sxh5#
        • 2.Rd6#
        • 2.Qg5#
        • 2.Qg7#
      • 1...Sxg4!
  • Keys
    • 1.e4!
      • threat
        • 2.Rd6#
      • 1...Qxf5
        • 2.Qg7#
      • 1...Qxf4
        • 2.Qg7#
      • 1...Qd1
        • 2.Qg7#
      • 1...Qg8
        • 2.Sh5#
      • 1...Rd2
        • 2.Qb6#
      • 1...Bc4
        • 2.Qa1#
      • 1...Sf7
        • 2.Re6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • Q(e);OGATE,XP(B)::QAB1(A)
    • Q(e);OGATE::QAB1(A)
    • Q(e);OGATE,P_PINR(F),XS(G)::QAB1(A)
    • Q(e);OGATE,XS(C)::QAB1(A)
    • Q(e);OGATE,XP(D)::QAB1(A)
    • Q(e);N_GUARD::S(C)
    • R(c);OGATE,XS(C)::QAR(A)
    • B(a);OGATE,XP(B)::QAB(A)
    • B(a);OGATE::QAB(A)
    • S(h);SBLOCK::R1(H)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • Q(e);OGATE,XS(C)::QAB1(A)
      • Refutation
        • K(f);P-FLIGHT,P_SPINQ(e)
    • Try
      • Q(A);XQ(e)
      • Threat
        • DUALS(3)
      • Refutation
        • S(d);XQ(A)
  • Actual
    • P(B);
    • Threat
      • R(F)
    • Vars
      • Q(e);OGATE,P_PINR(F),XS(G)::QAB1(A)
      • Q(e);OGATE,XS(C)::QAB1(A)
      • Q(e);OGATE::QAB1(A)
      • Q(e);N_GUARD::S(C)
      • R(c);OGATE::QAR(A)
      • B(a);OGATE::QAB(A)
      • S(h);SBLOCK::R1(H)
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