MESON Chess Problem Database

Problem Display
PID: 83654 (2r1b1nK/7Q/2PBkP2/RN3p1N/6P1/3Pn3/7r/1B2R1b1 w - - 0 1)

Ellerman, Arnoldo

Problem (Zagreb), 1951

2r1b1nK/7Q/2PBkP2/RN3p1N/6P1/3Pn3/7r/1B2R1b1

#2

12 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Ba2#
    • 1...Ra2
      • 2.Bxa2#
    • 1...Rh3
      • 2.Ba2#
    • 1...Rh4
      • 2.Ba2#
    • 1...Bf2
      • 2.Ba2#
    • 1...Bf7
      • 2.Qxf5#
    • 1...Sxf6
      • 2.Sf4#
  • Keys
    • 1.Be5!
      • threat
        • 2.Sd4#
      • 1...Kd5
        • 2.Sd4#
      • 1...Kxe5
        • 2.Qxf5#
      • 1...Sxg4
        • 2.Sf4#
      • 1...Rd8
        • 2.Sc7#
      • 1...Sd1
        • 2.Sf4#
      • 1...Sf1
        • 2.Sf4#
      • 1...Sc2
        • 2.Sf4#
        • 2.Ba2#
      • 1...Sg2
        • 2.Ba2#
      • 1...Sc4
        • 2.Sf4#
      • 1...Sd5
        • 2.gxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 7
  • Sets
    • R(b);N_GUARD::B(A)
    • R(b);N_GUARD::B(A),XR(b)
    • B(a);S_CUTR(b)::B(A)
    • B(g);SBLOCK::QAB1(K),XP(d)
    • S(h);SBLOCK,XP(J)::S(G)
  • Actual
    • B(I);N_PINS(c)
    • Threat
      • S(F)
    • Vars
      • K(e);S_FLIGHT::R(E)+S(F)
      • K(e);P-FLIGHT,P_SPINS(c),XB(I)::QAR1(K),XP(d)
      • S(c);XP(D)::S(G)
      • R(f);N_GUARD::S(F)
      • S(c);::S(G)
      • S(c);N_GUARD,S_CUTR(b)::B(A)
      • S(c);N_GUARD,SBLOCK::P(D),XP(d)
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