MESON Chess Problem Database

Problem Display
PID: 56551 (b4q2/5p2/6p1/1pr3N1/1N2pk1p/KP4RB/1Q4P1/4B3 w - - 0 1)

Ellerman, Arnoldo

2nd HM., Brisbane Courier, 1916-1917

b4q2/5p2/6p1/1pr3N1/1N2pk1p/KP4RB/1Q4P1/4B3

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Qf6#
    • 1...Rc2
      • 2.Qf6#
    • 1...Rc4
      • 2.Qf6#
    • 1...Re5
      • 2.Qf2#
    • 1...Rc7
      • 2.Qf6#
    • 1...Rc8
      • 2.Qf6#
    • 1...Bd5
      • 2.Qf6#
    • 1...e3
      • 2.Sd3#
    • 1...f5
      • 2.Se6#
    • 1...f6
      • 2.Se6#
  • Tries
    • 1.Sd5+?
      • 1...Bxd5
        • 2.Qf6#
      • 1...Rxd5+!
    • 1.Rg4+?
      • 1...Ke3
        • 2.Bf2#
        • 2.Qd2#
        • 2.Qf2#
      • 1...Kf5!
    • 1.Qd2+?
      • 1...e3
        • 2.Sd3#
        • 2.Qxe3#
      • 1...Ke5!
  • Keys
    • 1.Qd4!
      • threat
        • 2.Sd3#
      • 1...Rxg5
        • 2.Rf3#
      • 1...hxg3
        • 2.Bd2#
      • 1...Rc1
        • 2.Qf6#
      • 1...Rc2
        • 2.Qf6#
      • 1...Rc3
        • 2.Qf6#
      • 1...Rc4
        • 2.Qf6#
      • 1...Rd5
        • 2.Qxe4#
      • 1...Re5
        • 2.Qf2#
        • 2.Qe3#
      • 1...Rf5
        • 2.Rg4#
      • 1...Rc6
        • 2.Qxe4#
      • 1...Rc7
        • 2.Qf6#
      • 1...Rc8
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • R(e);N_GUARD,P_PINS(H)::QAR2(B)
    • R(e);P_PINS(H),SBLOCK::QAR2(B)
    • B(h);S_CUTR(e)::QAR2(B)
    • P(a);N_GUARD::S(H)
    • P(g);N_GUARD::S(I)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • B(h);XS(H)::QAR2(B)
      • Refutation
        • R(e);CHECK,XS(H)
    • Try
      • R(F);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(B);P_PINP(a)
    • Threat
      • S(H)
    • Vars
      • R(e);P_PINS(H),SBLOCK,XS(I)::R1(F)
      • P(c);SBLOCK,XR(F)::B(A)
      • R(e);N_GUARD,P_PINS(H)::QAR2(B)
      • R(e);N_GUARD,P_PINP(E),P_PINS(H)::QAR2(B)
      • R(e);P_PINS(H),S_CUTB(h)::QAR1(B),XP(a)
      • R(e);P_PINS(H),SBLOCK::R1(F)
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