MESON Chess Problem Database

Problem Display
PID: 18383 (b1nb2B1/6Q1/r2R1n1N/N1p1k2p/r3Pp2/2P5/1B5K/3R4 w - - 0 1)

Avner, Uri

4th HM., Probleemblad, 1955

b1nb2B1/6Q1/r2R1n1N/N1p1k2p/r3Pp2/2P5/1B5K/3R4

#2

10 + 10

3105 FIDE Album (1945-1955) 1964
3841 The Art of Israeli Chess Composition 1983
81 Chess 2007
56 The Problemist 2014
17424 Close Encounters with the Chess Pieces (Avner) 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe4
      • 2.Qg5#
    • 1...Rxa5
      • 2.Re6#
    • 1...Ra7
      • 2.Re6#
    • 1...Bxe4
      • 2.c4#
    • 1...Bc6
      • 2.Re6#
    • 1...Bb6
      • 2.Re6#
    • 1...Sb6
      • 2.Re6#
  • Keys
    • 1.Re1!
      • threat
        • 2.Sf7#
      • 1...Kxd6
        • 2.e5#
      • 1...Rxe4
        • 2.Sc4#
      • 1...Rxd6
        • 2.Qg5#
      • 1...Bxe4
        • 2.Rd5#
      • 1...Sxd6
        • 2.c4#
      • 1...f3
        • 2.Qg3#
      • 1...Ra7
        • 2.Re6#
      • 1...Bd5
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • R(a);SBLOCK,XP(E)::QAR2(I)
    • R(f);N_GUARD,XS(F)::R1(G)
    • R(f);N_GUARD::R1(G)
    • B(h);SBLOCK,XP(E)::B(B)+P(D)
    • B(h);S_CUTR(f)::R1(G)
    • B(j);S_CUTR(f)::R1(G)
    • S(i);S_CUTR(f)::R1(G)
  • Actual
    • R(A);
    • Threat
      • S(H)
    • Vars
      • K(d);N_SPINS(g),OGATE,S_FLIGHT,XR(G)::P(E)
      • R(a);N_GUARD,P_SPINR(a),XP(E)::S(F)
      • R(f);SBLOCK,XR(G)::QAR2(I)
      • B(h);N_GUARD,P_SPINB(h),XP(E)::R1(G)
      • S(i);SBLOCK,XR(G)::B(B)+P(D)
      • P(b);OGATEB::QAB(I)
      • R(f);N_GUARD::R1(G)
      • B(h);N_GUARD::R1(G),XB(h)
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