MESON Chess Problem Database

Problem Display
PID: 209529 (2K5/3p3p/1p4B1/1Q2NR2/nbp1k3/5r1n/4p3/2rb2B1 w - - 0 1)

Andersson, J

Land og Folk, 1967

2K5/3p3p/1p4B1/1Q2NR2/nbp1k3/5r1n/4p3/2rb2B1

#2

6 + 12

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qxc4#
    • 1...Rb1
      • 2.Qxc4#
    • 1...Bc2
      • 2.Qxc4#
    • 1...Sc3
      • 2.Qxc4#
    • 1...c3
      • 2.Qc4#
    • 1...h5
      • 2.Rxf3#
    • 1...h6
      • 2.Rxf3#
  • Keys
    • 1.Sxc4!
      • threat
        • 2.Qd5#
      • 1...Rxc4+
        • 2.Qxc4#
      • 1...Kd3
        • 2.Rxf3#
      • 1...Rxf5
        • 2.Qxf5#
      • 1...Rd3
        • 2.Qe5#
      • 1...Bc5
        • 2.Sd2#
      • 1...Sf4
        • 2.Re5#
      • 1...Sc3
        • 2.Sd2#
      • 1...Sc5
        • 2.Sd6#
      • 1...d5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 6
  • Sets
    • R(a);N_GUARD::QAR2(B),XP(h)
    • B(b);S_CUTR(a)::QAR2(B),XP(h)
    • S(f);S_CUTR(a)::QAR2(B),XP(h)
    • P(h);S_CUTR(a)::QAR2(B)
    • P(l);N_GUARD::B(E)+R(D),XR(d)
  • Actual
    • S(C);P_SPINS(C),XP(h)
    • Threat
      • QAB1(B)
    • Vars
      • R(a);CHECK,OGATE,XS(C)::QAR2(B),XR(a)
      • K(i);S_FLIGHT::B(E)+R(D),DCHECK,XR(d)
      • R(d);OGATE,P_SPINR(d),XR(D)::QAB1(B),XR(d)
      • R(d);SBLOCK::QAR1(B)
      • B(g);N_PINS(C)::S(C)
      • S(e);SBLOCK::B(E)+R(D),DCHECK
      • S(f);N_PINS(C)::S(C)
      • P(k);::QAB1(B),XP(k)
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