MESON Chess Problem Database

Problem Display
PID: 269159 (5RK1/3NN1B1/2pprpp1/nB3br1/3k1p2/2p2Q1R/2qp3b/8 w - - 0 1)

Burda, Josef

64 Shakhmatnoe obozrenie, 2023

5RK1/3NN1B1/2pprpp1/nB3br1/3k1p2/2p2Q1R/2qp3b/8

#2

8 + 14

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Qxc3#
    • 1...Be4
      • 2.Qf2#
    • 1...Sb3
      • 2.Sxc6#
    • 1...Sc4
      • 2.Sxc6#
    • 1...Sb7
      • 2.Sxc6#
    • 1...cxb5
      • 2.Qd5#
    • 1...c5
      • 2.Qd5#
  • Tries
    • 1.Qxf4+?
      • 1...Qe4
        • 2.Rd3#
      • 1...Re4
        • 2.Bxf6#
      • 1...Be4
        • 2.Qe3#
        • 2.Qf2#
      • 1...Bxf4!
  • Keys
    • 1.Rxf6!
      • threat
        • 2.Rxe6#
      • 1...Rxf6
        • 2.Bxf6#
      • 1...Rxe7
        • 2.Rxd6#
      • 1...Bxh3
        • 2.Rxf4#
      • 1...cxb5
        • 2.Qd5#
      • 1...Qe4
        • 2.Qxc3#
      • 1...Re1
        • 2.Rxd6#
      • 1...Re2
        • 2.Rxd6#
      • 1...Re3
        • 2.Rxd6#
      • 1...Re4
        • 2.Rxd6#
      • 1...Re5
        • 2.Rxd6#
      • 1...Bd3
        • 2.Rxf4#
      • 1...Be4
        • 2.Qf2#
      • 1...Bg4
        • 2.Rxf4#
      • 1...Sc4
        • 2.Sxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 3
  • Sets
    • Q(a);N_GUARD,SBLOCK::QAB1(A),XP(d)
    • B(h);SBLOCK,S_CUTR(l)::QAB(A)
    • S(g);N_GUARD::S(E),XP(j)
    • P(j);N_GUARD,XB(C)::QAR1(A)
    • P(j);N_GUARD::QAR1(A)
  • Tries
    • Try
      • Q(A);CHECK,XP(f)
      • Vars
        • Q(a);P_SPINQ(a)::R1(B)
        • R(l);P_SPINR(l)::B(F),XP(m)
      • Refutation
        • B(c);XQ(A)
  • Actual
    • R(G);XP(m)
    • Threat
      • B(F)+R(G),XR(l)
    • Vars
      • R(l);OGATE,P_SPINR(l),XR(G)::B(F),XR(l)
      • R(l);OGATE,XS(E)::B(F)+R(G),DCHECK,XP(k)
      • B(h);OGATE,XR(B)::B(F)+R(G),DCHECK,XP(f)
      • P(j);N_GUARD,XB(C)::QAR1(A)
      • Q(a);N_GUARD,SBLOCK::QAB1(A),XP(d)
      • R(l);OGATE::B(F)+R(G),DCHECK,XP(k)
      • R(l);OGATE::R(G),XP(k)
      • B(h);OGATE::B(F)+R(G),DCHECK,XP(f)
      • B(h);SBLOCK,S_CUTR(l)::QAB(A)
      • S(g);N_GUARD::S(E),XP(j)
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