MESON Chess Problem Database

Problem Display
PID: 83625 (RK5k/ppp3R1/bb6/6p1/5p2/1p3rp1/3r4/BB1Q4 w - - 0 1)

Ellerman, Arnoldo

Brisbane Courier, 1933

RK5k/ppp3R1/bb6/6p1/5p2/1p3rp1/3r4/BB1Q4

#2

6 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Qd8#
    • 1...Rc2
      • 2.Qd8#
    • 1...Rdf2
      • 2.Qd8#
    • 1...Rg2
      • 2.Qd8#
    • 1...Rh2
      • 2.Qd8#
    • 1...Rdd3
      • 2.Qh1#
    • 1...Rd5
      • 2.Qh1#
    • 1...Rd7
      • 2.Qh1#
    • 1...Rd8+
      • 2.Qxd8#
    • 1...Rf1
      • 2.Qh5#
    • 1...Rff2
      • 2.Qh5#
    • 1...Rfd3
      • 2.Qh5#
    • 1...Re3
      • 2.Qh5#
    • 1...Be2
      • 2.Qh1#
    • 1...Bd3
      • 2.Kxb7#
    • 1...Bf2
      • 2.Qh1#
  • Tries
    • 1.Be5?
      • threat
        • 2.Rxg5#
      • 1...Rd8+
        • 2.Qxd8#
      • 1...Rc2
        • 2.Qd8#
      • 1...Re2
        • 2.Qd8#
      • 1...Rdd3
        • 2.Qh1#
      • 1...Rd5
        • 2.Qh1#
      • 1...Rd7
        • 2.Qh1#
      • 1...Rfd3
        • 2.Qh5#
      • 1...Re3
        • 2.Qh5#
      • 1...Bd3
        • 2.Kxb7#
      • 1...Bd4
        • 2.Kxc7#
      • 1...g4
        • 2.Rxg4#
        • 2.Rg5#
      • 1...Rd6!
    • 1.Rxg5+?
      • 1...Rb2
        • 2.Qh1#
        • 2.Qd8#
      • 1...Rd4
        • 2.Qh1#
      • 1...Rc3
        • 2.Qh5#
      • 1...Bd4
        • 2.Kxc7#
      • 1...b2!
  • Keys
    • 1.Bf6!
      • threat
        • 2.Rxg5#
      • 1...Rd8+
        • 2.Qxd8#
      • 1...Rc2
        • 2.Qd8#
      • 1...Rdd3
        • 2.Qh1#
      • 1...Rd6
        • 2.Qh1#
      • 1...Rd7
        • 2.Qh1#
      • 1...Rfd3
        • 2.Qh5#
      • 1...Bd3
        • 2.Kxb7#
      • 1...Bd4
        • 2.Kxc7#
      • 1...g4
        • 2.Rxg4#
        • 2.Rg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • R(a);OGATE::QAR(C)
    • R(a);N_GUARD::QAB(C)
    • R(a);CHECK,OGATE::QAR(C),XR(a)
    • R(c);OGATE::QAR(C)
    • B(g);S_CUTR(a)::QAB(C)
    • B(g);::R(E)+K(F),XP(j)
    • B(h);S_CUTR(a)::QAB(C)
  • Tries
    • Try
      • B(A);
      • Threat
        • B(A)+R(D),XP(f)
      • Vars
        • R(a);CHECK,OGATE::QAR(C),XR(a)
        • R(a);OGATE::QAR(C)
        • R(a);N_GUARD::QAB(C)
        • R(c);OGATE::QAR(C)
        • B(g);::R(E)+K(F),XP(j)
        • B(h);::R(E)+K(F),XP(k)
      • Refutation
        • R(a);
    • Try
      • R(D);CHECK,XP(f)
      • Vars
        • R(a);P_SPINR(a)::QAB(C)
        • R(c);OGATE,P_SPINR(c)::QAR(C)
        • B(h);P_SPINB(h)::R(E)+K(F),XP(k)
      • Refutation
        • P(b);P_SPINP(b)
  • Actual
    • B(A);
    • Threat
      • B(A)+R(D),XP(f)
    • Vars
      • R(a);CHECK,OGATE::QAR(C),XR(a)
      • R(a);OGATE::QAR(C)
      • R(a);N_GUARD::QAB(C)
      • R(c);OGATE::QAR(C)
      • B(g);::R(E)+K(F),XP(j)
      • B(h);::R(E)+K(F),XP(k)
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