MESON Chess Problem Database

Problem Display
PID: 137652 (1Bb5/R7/5N2/3R2K1/8/4kp2/2pnr1n1/2Q5 w - - 0 1)

Ellerman, Arnoldo

5th Prize, SVTVS, 1954

1Bb5/R7/5N2/3R2K1/8/4kp2/2pnr1n1/2Q5

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Qxd2#
    • 1...f2
      • 2.Ra3#
  • Tries
    • 1.Ra1?
      • threat
        • 2.Ba7#
      • 1...Kf2
        • 2.Qg1#
      • 1...Re1
        • 2.Qxd2#
      • 1...f2
        • 2.Ra3#
      • 1...Rf2!
    • 1.Ra4?
      • threat
        • 2.Ba7#
      • 1...Re1
        • 2.Qxd2#
      • 1...Rf2
        • 2.Re4#
      • 1...f2
        • 2.Ra3#
      • 1...Kf2!
    • 1.Re7+?
      • 1...Be6
        • 2.Ba7#
      • 1...Kf2!
  • Keys
    • 1.Rad7!
      • threat
        • 2.Ba7#
      • 1...Kf2
        • 2.Sg4#
      • 1...Re1
        • 2.Qxd2#
      • 1...Rf2
        • 2.Re5#
      • 1...f2
        • 2.Rd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD::QAB1(A),XS(b)
    • P(f);SBLOCK::R(E)
  • Tries
    • Try
      • R(E);
      • Threat
        • B(F)
      • Vars
        • K(e);N_SPINS(b),S_FLIGHT::QAB1(A)
        • R(c);N_GUARD::QAB1(A),XS(b)
        • P(f);SBLOCK::R(E)
      • Refutation
        • R(c);
    • Try
      • R(E);
      • Threat
        • B(F)
      • Vars
        • R(c);N_GUARD::QAB1(A),XS(b)
        • R(c);SBLOCK::R1(E)
        • P(f);SBLOCK::R(E)
      • Refutation
        • K(e);N_SPINS(b),S_FLIGHT
    • Try
      • R(E);CHECK
      • Vars
        • B(g);P_SPINB(g)::B(F)
      • Refutation
        • K(e);N_SPINS(b),S_FLIGHT
  • Actual
    • R(E);
    • Threat
      • B(F)
    • Vars
      • K(e);N_SPINS(b),S_FLIGHT::S(D)
      • R(c);N_GUARD::QAB1(A),XS(b)
      • R(c);SBLOCK::R(B)
      • P(f);SBLOCK::R1(B)
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