MESON Chess Problem Database

Problem Display
PID: 83540 (2r5/3Q4/4p3/1pp1pPR1/NRqnk3/r1b2pBp/2p2P1K/2N2b2 w - - 0 1)

Ellerman, Arnoldo

1st HM., Chess Amateur (The), 1920

2r5/3Q4/4p3/1pp1pPR1/NRqnk3/r1b2pBp/2p2P1K/2N2b2

#2

9 + 14

81 Chess 1956
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Se2
      • 2.Qd3#
    • 1...Sb3
      • 2.Sxc3#
    • 1...Sxf5
      • 2.Rg4#
    • 1...Sc6
      • 2.Sxc5#
  • Tries
    • 1.Qd6?
      • threat
        • 2.Qxe5#
      • 1...Sxf5
        • 2.Rg4#
      • 1...Se2
        • 2.Qd3#
      • 1...Sb3
        • 2.Sxc3#
      • 1...Sc6
        • 2.Sxc5#
      • 1...Qd5!
  • Keys
    • 1.f6!
      • threat
        • 2.Rxe5#
      • 1...Qd5
        • 2.Qh7#
      • 1...Se2
        • 2.Qd3#
      • 1...Sb3
        • 2.Sxc3#
      • 1...Sf5
        • 2.Rg4#
      • 1...Sc6
        • 2.Sxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(h);OGATE,P_SPINQ(g)::QAB1(I)
    • S(h);P_SPINQ(g),S_CUTR(c)::S(E),XB(d)
    • S(h);P_SPINQ(g),SBLOCK,XP(G)::R(H)
    • S(h);P_SPINQ(g),S_CUTR(n)::S(E),XP(k)
  • Tries
    • Try
      • Q(I);
      • Threat
        • QAR1(I),XP(l)
      • Vars
        • S(h);P_SPINQ(g),SBLOCK,XP(G)::R(H)
        • S(h);OGATE,P_SPINQ(g)::QAB1(I)
        • S(h);P_SPINQ(g),S_CUTR(c)::S(E),XB(d)
        • S(h);P_SPINQ(g),S_CUTR(n)::S(E),XP(k)
      • Refutation
        • Q(g);P_SPINS(h)
  • Actual
    • P(G);
    • Threat
      • R1(H),XP(l)
    • Vars
      • Q(g);P_SPINS(h),SBLOCK::QAB(I)
      • S(h);OGATE,P_SPINQ(g)::QAB1(I)
      • S(h);P_SPINQ(g),S_CUTR(c)::S(E),XB(d)
      • S(h);P_SPINQ(g),SBLOCK::R(H)
      • S(h);P_SPINQ(g),S_CUTR(n)::S(E),XP(k)
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