MESON Chess Problem Database

Problem Display
PID: 266408 (B7/Pn6/2N4r/P1kp1Q2/1Rp3p1/KPpp2B1/2PR4/2N2b2 w - - 0 1)

Forster, Klaus

2nd Prize, Schach, 2016-2017

B7/Pn6/2N4r/P1kp1Q2/1Rp3p1/KPpp2B1/2PR4/2N2b2

#2

12 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc6
      • 2.Qc8#
    • 1...Sd6
      • 2.Bf2#
    • 1...dxc2
      • 2.Qxd5#
  • Tries
    • 1.Ka4?
      • threat
        • 2.Rxc4#
      • 1...Kxc6
        • 2.Qc8#
      • 1...Sxa5
        • 2.Rb5#
      • 1...dxc2
        • 2.Qxd5#
      • 1...Sd6
        • 2.Bf2#
      • 1...cxb3!
    • 1.Rb5+?
      • 1...Kxc6
        • 2.Qxd5#
      • 1...Kxb5!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Rxc4#
      • 1...Kxd4
        • 2.Bf2#
      • 1...Sxa5
        • 2.Qxd5#
      • 1...dxc2
        • 2.Rb5#
      • 1...cxb3
        • 2.Scxb3#
      • 1...Sd6
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(f);N_SPINP(g),OGATEB,P-FLIGHT,P_SPINS(i),XS(J)::QAR2(I)
    • S(i);SBLOCK::B(F)
    • P(c);XP(B)::QAR1(I),XP(g)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Threat
        • R1(G),XP(d)
      • Vars
        • K(f);N_SPINP(g),OGATEB,P-FLIGHT,P_SPINS(i),XS(J)::QAR2(I)
        • S(i);XP(H)::R1(G)
        • P(c);XP(B)::QAR1(I),XP(g)
        • S(i);SBLOCK::B(F)
      • Refutation
        • P(d);XP(E)
    • Try
      • R(G);CHECK
      • Vars
        • K(f);N_SPINP(g),P-FLIGHT,P_SPINS(i),XS(J)::QAB1(I),XP(g)
      • Refutation
        • K(f);P-FLIGHT,XR(G)
  • Actual
    • S(J);
    • Threat
      • R1(G),XP(d)
    • Vars
      • K(f);N_SPINP(g),OGATEB,P_SPINP(c),S_FLIGHT,XS(J)::B(F)
      • S(i);XP(H)::QAR1(I),XP(g)
      • P(c);XP(B)::R1(G)
      • P(d);XP(E)::S(A),XP(d)
      • S(i);::QAR1(I),XP(g)
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