MESON Chess Problem Database

Problem Display
PID: 183661 (4N3/pK6/P7/1BkN1Rn1/Q1Pp1p1B/2PP4/n6b/rr5b w - - 0 1)

Hirschenson, Aaron

www.slavchess.com, 2004

4N3/pK6/P7/1BkN1Rn1/Q1Pp1p1B/2PP4/n6b/rr5b

#2

11 + 10

4901 Best Problems 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb5+
      • 2.Qxb5#
    • 1...Bxd5+
      • 2.Rxd5#
    • 1...Sf3
      • 2.Be7#
    • 1...Sh3
      • 2.Be7#
    • 1...Se4
      • 2.Se3#
      • 2.Sb4#
      • 2.Sxf4#
      • 2.Sb6#
      • 2.Sdf6#
      • 2.Sdc7#
      • 2.Se7#
    • 1...Se6
      • 2.Be7#
    • 1...Sh7
      • 2.Be7#
    • 1...dxc3
      • 2.Bf2#
    • 1...f3
      • 2.Sf4#
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qc7#
      • 1...Rxb5+
        • 2.Qxb5#
      • 1...Bxd5+
        • 2.Rxd5#
      • 1...dxc3
        • 2.Bf2#
      • 1...Sb4
        • 2.Ba4#
      • 1...Se6
        • 2.Be7#
      • 1...f3
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(b);CHECK,OGATE,XB(F)::QAR1(C),XR(b)
    • B(c);CHECK,OGATE,P_SPINB(c),XS(G)::R1(H),XB(c)
    • S(i);N_PINS(G),OGATE::B(E)
    • S(i);OGATE::B(E)
    • P(f);OGATEB,XP(A)::B(E)
    • P(g);N_PINS(G)::R(H)+S(G)
  • Actual
    • Q(C);
    • Threat
      • QAR2(C)
    • Vars
      • R(b);CHECK,OGATE,P_SPINR(b),XB(F)::QAR1(C),XR(b)
      • B(c);CHECK,OGATE,P_SPINB(c),XS(G)::R1(H),XB(c)
      • P(f);OGATEB,XP(A)::B(E)
      • S(d);N_PINB(F)::QAR(C)+B(F)
      • S(i);OGATE::B(E)
      • P(g);N_PINS(G)::R(H)+S(G)
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