MESON Chess Problem Database

Problem Display
PID: 238733 (1r2nB2/2p1K3/4N2N/2p1k1pp/2R1p1pq/b5p1/3Q4/8 w - - 0 1)

Ellerman, Arnoldo

L'Italia Scacchistica, 1960

1r2nB2/2p1K3/4N2N/2p1k1pp/2R1p1pq/b5p1/3Q4/8

#2

6 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qh1
      • 2.Qxg5#
    • 1...Qh2
      • 2.Qxg5#
    • 1...Qh3
      • 2.Qxg5#
    • 1...Rb4
      • 2.Rxc5#
    • 1...Bc1
      • 2.Rxc5#
    • 1...Bb2
      • 2.Rxc5#
    • 1...Sd6
      • 2.Bg7#
    • 1...Sg7
      • 2.Bxg7#
  • Tries
    • 1.Sxc5?
      • threat
        • 2.Rxe4#
      • 1...Bxc5+
        • 2.Rxc5#
      • 1...Qh1
        • 2.Qxg5#
      • 1...Rb4
        • 2.Sd7#
      • 1...Sd6
        • 2.Sd7#
        • 2.Bg7#
      • 1...e3
        • 2.Re4#
        • 2.Qd4#
      • 1...Sf6!
    • 1.Sg7?
      • threat
        • 2.Sf7#
      • 1...Sxg7
        • 2.Bxg7#
      • 1...Sd6!
    • 1.Sd8?
      • threat
        • 2.Sc6#
        • 2.Sdf7#
      • 1...Rb6
        • 2.Sdf7#
      • 1...Sd6
        • 2.Sc6#
        • 2.Bg7#
      • 1...c6
        • 2.Sxc6#
        • 2.Sdf7#
      • 1...Rxd8!
    • 1.Bg7+?
      • 1...Sf6
        • 2.Bxf6#
      • 1...Sxg7!
    • 1.Qf4+?
      • 1...Kd5
        • 2.Qxe4#
      • 1...gxf4+!
  • Keys
    • 1.Sxg5!
      • threat
        • 2.Rxe4#
      • 1...Qxg5+
        • 2.Qxg5#
      • 1...Qh1
        • 2.Sgf7#
      • 1...Rb4
        • 2.Rxc5#
      • 1...Sd6
        • 2.Bg7#
      • 1...Sf6
        • 2.Sgf7#
      • 1...e3
        • 2.Re4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(e);N_GUARD::QAR2(A),XP(h)
    • R(k);S_CUTB(a)::R(B),XP(f)
    • B(a);N_GUARD::R(B),XP(f)
    • S(l);N_GUARD::B(F)
    • S(l);N_GUARD::B(F),XS(l)
  • Tries
    • Try
      • S(C);P_SPINS(C),XP(f)
      • Threat
        • R1(B),XP(c)
      • Vars
        • B(a);CHECK,OGATE,XS(C)::R(B),XB(a)
        • Q(e);N_GUARD::QAR2(A),XP(h)
        • R(k);N_PINS(C)::S(C)
      • Refutation
        • S(l);
    • Try
      • S(C);
      • Threat
        • S(D)
      • Vars
        • S(l);OGATE,XS(C)::B(F),XS(l)
      • Refutation
        • S(l);
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(k);::S(C)
      • Refutation
        • R(k);XS(C)
    • Try
      • B(F);CHECK
      • Vars
        • S(l);N_GUARD,P_SPINS(l)::B(F),XS(l)
      • Refutation
        • S(l);XB(F)
    • Try
      • Q(A);CHECK
      • Vars
        • K(g);P-FLIGHT::QAB1(A),XP(c)
      • Refutation
        • P(h);CHECK,XQ(A)
  • Actual
    • S(C);P_SPINS(C),XP(h)
    • Threat
      • R1(B),XP(c)
    • Vars
      • Q(e);CHECK,OGATE,XS(C)::QAR2(A),XQ(e)
      • Q(e);N_PINS(C)::S(C)
      • R(k);S_CUTB(a)::R(B),XP(f)
      • S(l);N_GUARD::B(F)
      • S(l);N_PINS(C)::S(C)
      • P(c);::R1(B)
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