MESON Chess Problem Database

Problem Display
PID: 182735 (2R5/4pn2/3p4/KN1k2p1/R3pBQ1/2P3N1/8/3rb3 w - - 0 1)

Prins, Hendrik

Boletim da UBP, 1990

2R5/4pn2/3p4/KN1k2p1/R3pBQ1/2P3N1/8/3rb3

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Rd4#
    • 1...Rc1
      • 2.Rd4#
    • 1...Rd2
      • 2.c4#
    • 1...Rd4
      • 2.Rxd4#
    • 1...Bd2
      • 2.Rd4#
    • 1...Bf2
      • 2.c4#
    • 1...Bxc3+
      • 2.Sxc3#
    • 1...Bxg3
      • 2.c4#
  • Tries
    • 1.Rcc4?
      • threat
        • 2.Sc7#
      • 1...Bxc3+
        • 2.Sxc3#
      • 1...gxf4!
    • 1.Qxd1+?
      • 1...Bd2
        • 2.Qb3#
      • 1...Ke6!
    • 1.Qf5+?
      • 1...e5
        • 2.Qxf7#
      • 1...Se5!
  • Keys
    • 1.Bd2!
      • threat
        • 2.Qxe4#
      • 1...Ke5
        • 2.Qf5#
      • 1...Se5
        • 2.Rd4#
      • 1...e3
        • 2.Qe4#
      • 1...e5
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • R(a);N_GUARD::R1(C)
    • R(a);N_PINP(A)::P(A)
    • R(a);N_GUARD::R1(C),XR(a)
    • B(b);S_CUTR(a)::R1(C)
    • B(b);N_PINP(A)::P(A)
    • B(b);CHECK,XP(A)::S(G),XB(b)
    • B(b);N_PINP(A),XS(B)::P(A)
  • Tries
    • Try
      • R(H);
      • Threat
        • S(G)
      • Vars
        • B(b);CHECK,XP(A)::S(G),XB(b)
      • Refutation
        • P(e);XB(D)
    • Try
      • Q(E);CHECK,XR(a)
      • Vars
        • B(b);P_SPINB(b)::QAB(E)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • P(g);N_GUARD,P_SPINP(g)::QAB(E),XS(h)
      • Refutation
        • S(h);P_SPINS(h)
  • Actual
    • B(D);N_SPINP(A)
    • Threat
      • QAB1(E),XP(c)
    • Vars
      • K(d);P-FLIGHT::QAR1(E)
      • S(h);SBLOCK::R1(C)
      • P(c);::QAB1(E)
      • P(g);SBLOCK::P(A)
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