MESON Chess Problem Database

Problem Display
PID: 23013 (3N3K/2r1pp2/5P2/2n1kNP1/R1n1P3/B1P2rPQ/8/4R2B w - - 0 1)

Hassberg, Eric Manfred

2nd Prize, Xadrez Brasileiro TT, 1944

3N3K/2r1pp2/5P2/2n1kNP1/R1n1P3/B1P2rPQ/8/4R2B

#2

13 + 7

5064 100 Years of the American Two-move Chess Problem 1962
3105 FIDE Album (1945-1955) 1964
145 StrateGems 1998

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg3
      • 2.Qxg3#
    • 1...Se6
      • 2.Sxf7#
  • Keys
    • 1.Se3!
      • threat
        • 2.Sxc4#
      • 1...Kxe4
        • 2.Qf5#
      • 1...Kd6
        • 2.Sxc4#
      • 1...Rxe3
        • 2.Sxf7#
      • 1...Rxg3
        • 2.Qxg3#
      • 1...Sxa3
        • 2.Sxf7#
      • 1...Sxe3
        • 2.Sxf7#
      • 1...Sxa4
        • 2.Sg4#
      • 1...Sxe4
        • 2.Sxf7#
      • 1...Sb2
        • 2.Sxf7#
      • 1...Sd2
        • 2.Sxf7#
      • 1...Sa5
        • 2.Sxf7#
      • 1...Sb6
        • 2.Sxf7#
      • 1...Sd6
        • 2.Sg4#
      • 1...Sb3
        • 2.Sg4#
      • 1...Sd3
        • 2.Sg4#
      • 1...Sa6
        • 2.Sg4#
      • 1...Se6
        • 2.Sg4#
      • 1...Sb7
        • 2.Sg4#
      • 1...Sd7
        • 2.Sg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 17
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE,XP(E)::QAB(F),XR(a)
    • S(c);SBLOCK::S(L),XP(g)
  • Actual
    • S(I);
    • Threat
      • S(I),XS(b)
    • Vars
      • K(d);P-FLIGHT,P_SPINR(a),P_SPINS(b),XP(H)::QAB1(F)
      • K(d);P_SPINS(c),S_FLIGHT::S(I),XS(b)
      • R(a);XS(I)::S(L),XP(g)
      • R(a);OGATE,XP(E)::QAB(F),XR(a)
      • S(b);XB(C)::S(L),XP(g)
      • S(b);XS(I)::S(L),XP(g)
      • S(c);XR(G)::S(I)
      • S(c);SBLOCK,XP(H)::S(L),XP(g)
      • S(b);::S(L),XP(g)
      • S(b);SBLOCK::S(I)
      • S(c);::S(I)
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