MESON Chess Problem Database

Problem Display
PID: 157532 (8/2N1Q2K/1r3pN1/1pR5/np1k1bbR/4p3/1PP2n2/4r2B w - - 0 1)

Ellerman, Arnoldo

Brisbane Courier, 1919

8/2N1Q2K/1r3pN1/1pR5/np1k1bbR/4p3/1PP2n2/4r2B

#2

9 + 11

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Ra6
      • 2.Sxb5#
    • 1...Rc6
      • 2.Sxb5#
    • 1...Re6
      • 2.Sxb5#
    • 1...Bd6
      • 2.Se6#
  • Tries
    • 1.Qd6+?
      • 1...Bxd6
        • 2.Se6#
      • 1...Rxd6!
    • 1.Qe4+?
      • 1...Kxc5
        • 2.Qd5#
      • 1...Sxe4!
  • Keys
    • 1.Rc3!
      • threat
        • 2.Qxb4#
      • 1...Sxb2
        • 2.Qc5#
      • 1...bxc3
        • 2.Qb4#
      • 1...Rc6
        • 2.Sxb5#
      • 1...Rd6
        • 2.Sxb5#
      • 1...Bd6
        • 2.Se6#
      • 1...Be2
        • 2.Qxe3#
      • 1...Be6
        • 2.Qxf6#
      • 1...Sd3
        • 2.Qe4#
      • 1...Sc5
        • 2.Qxc5#
      • 1...b3
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 2
  • Sets
    • R(j);N_GUARD::S(G),XP(i)
    • B(g);P_SPINB(h),S_CUTR(j)::S(G)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • B(g);P_SPINB(h),XQ(H)::S(G)
      • Refutation
        • R(j);XQ(H)
    • Try
      • Q(H);CHECK
      • Vars
        • K(f);S_FLIGHT,XR(E)::QAR1(H)
      • Refutation
        • S(b);XQ(H)
  • Actual
    • R(E);
    • Threat
      • QAR2(H),XP(e)
    • Vars
      • S(d);N_GUARD,XP(B)::QAB1(H)
      • P(e);XR(E)::QAR2(H)
      • R(j);N_GUARD::S(G),XP(i)
      • B(g);P_SPINB(h),S_CUTR(j)::S(G)
      • B(h);P_SPINB(g),S_CUTR(a)::QAB1(H),XP(c)
      • B(h);P_SPINB(g),S_CUTR(j)::QAB(H),XP(k)
      • S(b);N_GUARD::QAR1(H)
      • S(d);N_GUARD::QAB1(H),XS(d)
      • P(e);::QAR2(H)
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