MESON Chess Problem Database

Problem Display
PID: 196330 (7R/4N3/4r3/r3k1PQ/p1R1n1P1/K1NPpP2/nB4Pq/4b3 w - - 0 1)

Coello Alonso, Jose Antonio

BCPS Website, 2019

7R/4N3/4r3/r3k1PQ/p1R1n1P1/K1NPpP2/nB4Pq/4b3

#2

12 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Se2#
    • 1...Rd6
      • 2.Rxe4#
    • 1...Sf2
      • 2.Qxh2#
    • 1...Sd6
      • 2.Sc6#
  • Tries
    • 1.Sb5+?
      • 1...Bc3
        • 2.Rxe4#
      • 1...Sac3
        • 2.Rxe4#
      • 1...Sec3
        • 2.Re4#
      • 1...Kf4!
    • 1.Sg6+?
      • 1...Kd6
        • 2.Rd8#
      • 1...Rxg6!
    • 1.d4+?
      • 1...Kf4
        • 2.Se2#
      • 1...Kd6!
  • Keys
    • 1.Rd8!
      • threat
        • 2.Rxe4#
      • 1...Kf4
        • 2.Se2#
      • 1...Sexc3
        • 2.Re4#
      • 1...Sxg5
        • 2.Qxg5#
      • 1...Qf4
        • 2.d4#
      • 1...Sd2
        • 2.Sxa2#
      • 1...Sf2
        • 2.Qxh2#
      • 1...Sg3
        • 2.f4#
      • 1...Sc5
        • 2.Rd5#
      • 1...Sd6
        • 2.Sc6#
      • 1...Sf6
        • 2.Sg6#

This is a version of 196329

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • K(h);P_SPINS(f),S_FLIGHT::S(D)
    • R(i);SBLOCK::R1(G),XS(f)
    • S(f);N_GUARD,S_CUTB(a)::QAB(J),XQ(c)
    • S(f);SBLOCK,S_CUTR(i)::S(K)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • B(a);P_SPINB(a)::R1(G),XS(f)
        • S(b);P_SPINS(b)::R1(G),XS(f)
        • S(f);P_SPINS(f)::R1(G)
      • Refutation
        • K(h);P_SPINS(f),S_FLIGHT
    • Try
      • S(K);CHECK
      • Vars
        • K(h);S_FLIGHT::R(L)
      • Refutation
        • R(i);XS(K)
    • Try
      • P(E);CHECK
      • Vars
        • K(h);S_FLIGHT::S(D)
      • Refutation
        • K(h);S_FLIGHT
  • Actual
    • R(L);
    • Threat
      • R1(G),XS(f)
    • Vars
      • K(h);P_SPINS(f),S_FLIGHT::S(D)
      • S(f);P_SPINS(f),XS(D)::R1(G)
      • S(f);OGATE,P_SPINS(f),XP(I)::QAR2(J),XS(f)
      • Q(c);SBLOCK::P(E)
      • S(f);N_GUARD,S_CUTB(a)::B(A)+S(D),XS(b)
      • S(f);N_GUARD,S_CUTB(a)::QAB(J),XQ(c)
      • S(f);S_CUTQ(c)::P(F)
      • S(f);S_CUTR(g)::R1(L)
      • S(f);S_CUTR(i)::S(K)
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