MESON Chess Problem Database

Problem Display
PID: 83575 (B7/4p1n1/pQq2RK1/r2k3p/1n6/1P2pPB1/p1p3N1/3r2b1 w - - 0 1)

Ellerman, Arnoldo

Western Morning News and Mercury, 1921

(First published on Sat Aug 20 1921)

B7/4p1n1/pQq2RK1/r2k3p/1n6/1P2pPB1/p1p3N1/3r2b1

#2

8 + 13

6490 yacpdb 2009
15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Qxa5#
    • 1...Rc5
      • 2.Qd8#
    • 1...Bh2
      • 2.Sxe3#
    • 1...Sd3
      • 2.Bxc6#
    • 1...Se6
      • 2.Rf5#
  • Tries
    • 1.Bc7?
      • threat
        • 2.Sf4#
      • 1...Rd4
        • 2.Qxa5#
      • 1...Bh2
        • 2.Sxe3#
      • 1...Sd3
        • 2.Bxc6#
      • 1...Se6
        • 2.Rf5#
      • 1...e5
        • 2.Rd6#
      • 1...Rc5!
    • 1.Rxc6?
      • threat
        • 2.Rd6#
        • 2.Qd8#
      • 1...Sf5
        • 2.Rd6#
      • 1...Se6
        • 2.Rd6#
      • 1...Se8
        • 2.Rd6#
      • 1...Sxc6!
    • 1.Qxc6+?
      • 1...Kd4
        • 2.Qc4#
      • 1...Sxc6!
  • Keys
    • 1.Bb8!
      • threat
        • 2.Sf4#
      • 1...Rc5
        • 2.Qd8#
      • 1...Rd4
        • 2.Qxa5#
      • 1...Bh2
        • 2.Sxe3#
      • 1...Sd3
        • 2.Bxc6#
      • 1...Se6
        • 2.Rf5#
      • 1...e5
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(a);SBLOCK::QAR(E),XR(g)
    • R(g);SBLOCK::QAR(E)
    • B(b);N_GUARD::S(A),XP(e)
    • S(f);N_GUARD::B(H),XQ(k)
    • S(m);N_PINR(F),SBLOCK::R(F)
  • Tries
    • Try
      • B(D);
      • Threat
        • S(A)
      • Vars
        • R(a);SBLOCK::QAR(E),XR(g)
        • B(b);N_GUARD::S(A),XP(e)
        • S(f);N_GUARD::B(H),XQ(k)
        • S(m);N_PINR(F),SBLOCK::R(F)
        • P(l);N_GUARD,SBLOCK::R1(F)
      • Refutation
        • R(g);
    • Try
      • R(F);N_SPINR(F),XQ(k)
      • Threat
        • DUALS(2)
      • Vars
        • S(m);::B(H)+R(F),DCHECK
      • Refutation
        • S(f);P_SPINS(f),XR(F)
    • Try
      • Q(E);CHECK,N_SPINR(F),XQ(k)
      • Vars
        • K(h);P-FLIGHT::QAR1(E)
      • Refutation
        • S(f);P_SPINS(f),XQ(E)
  • Actual
    • B(D);
    • Threat
      • S(A)
    • Vars
      • R(g);SBLOCK::QAR(E)
      • R(a);SBLOCK::QAR(E),XR(g)
      • B(b);N_GUARD::S(A),XP(e)
      • S(f);N_GUARD::B(H),XQ(k)
      • S(m);N_PINR(F),SBLOCK::R(F)
      • P(l);N_GUARD,SBLOCK::R1(F)
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