MESON Chess Problem Database

Problem Display
PID: 273426 (b5R1/5p2/2Np1k2/3Q1np1/1N1P2p1/5n2/KB6/5R2 w - - 0 1)

Medovikov, AV

Schackvarlden, 1929

b5R1/5p2/2Np1k2/3Q1np1/1N1P2p1/5n2/KB6/5R2

#2

8 + 8

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Rxf5#
      • 2.Qxf5#
      • 2.Qxd6#
    • 1...Sg1
      • 2.Rxf5#
      • 2.Qxf5#
      • 2.Qxd6#
    • 1...Sd2
      • 2.Rxf5#
      • 2.Qxf5#
      • 2.Qxd6#
    • 1...Sh2
      • 2.Rxf5#
      • 2.Qxf5#
      • 2.Qxd6#
    • 1...S3xd4
      • 2.Bxd4#
      • 2.Rxf5#
      • 2.Qxf5#
      • 2.Qxd6#
    • 1...S3h4
      • 2.Qxd6#
    • 1...Se5
      • 2.Qxd6#
    • 1...S5xd4
      • 2.Bxd4#
  • Tries
    • 1.Rxf3?
      • threat
        • 2.Rxf5#
        • 2.Qxf5#
        • 2.Qxd6#
      • 1...Bxc6
        • 2.Qxd6#
      • 1...gxf3!
    • 1.Qe4?
      • threat
        • 2.Sd5#
      • 1...Se5
        • 2.Qxf5#
      • 1...Se3
        • 2.d5#
      • 1...Se7
        • 2.d5#
      • 1...d5
        • 2.Sxd5#
      • 1...Bxc6!
  • Keys
    • 1.Sd8!
      • threat
        • 2.Qxf7#
      • 1...Bxd5+
        • 2.Sxd5#
      • 1...Ke7
        • 2.Qxf7#
      • 1...S3xd4
        • 2.Qxd6#
      • 1...S5xd4
        • 2.Qxg5#
      • 1...Se5
        • 2.Qxd6#
      • 1...Sh6
        • 2.Qxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(a);P_SPINS(c)::QAR2(F),XP(e)
    • S(c);OGATE,P_SPINS(a),XP(E)::B(C),XS(c)
  • Tries
    • Try
      • R(A);P_PINS(c),XS(a)
      • Threat
        • DUALS(3)
      • Vars
        • B(h);XS(G)::QAR2(F),XP(e)
      • Refutation
        • P(b);N_SPINS(c),XR(A)
    • Try
      • Q(F);
      • Threat
        • S(D)
      • Vars
        • S(a);P_SPINS(c)::QAR1(F),XS(c)
        • S(c);N_GUARD,P_SPINS(a)::B(C)+P(E)
        • P(e);::S(D),XP(e)
      • Refutation
        • B(h);XS(G)
  • Actual
    • S(G);
    • Threat
      • QAR1(F),XP(g)
    • Vars
      • B(h);CHECK,XQ(F)::S(D),XB(h)
      • K(f);S_FLIGHT::QAR1(F),XP(g)
      • S(a);P_SPINS(a),S_CUTS(c),XP(E)::QAR2(F),XP(e)
      • S(c);OGATE,P_SPINS(a),XP(E)::QAB1(F),XP(d)
      • S(a);P_SPINS(c)::QAR2(F),XP(e)
      • S(c);OGATE,P_SPINS(a)::QAB1(F),XP(d)
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