MESON Chess Problem Database

Problem Display
PID: 178588 (8/7B/3pR2p/3ppr1P/q1bBk3/1R1NPN2/6P1/3Q1K2 w - - 0 1)

Coutinho, Jose Ernesto

Boletim da UBP, 1981

8/7B/3pR2p/3ppr1P/q1bBk3/1R1NPN2/6P1/3Q1K2

#2

11 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bxb3
      • 2.Sf2#
    • 1...Bxd3+
      • 2.Qxd3#
  • Tries
    • 1.Kg1?
      • threat
        • 2.Sf2#
        • 2.Sd2#
      • 1...Qxb3
        • 2.Sf2#
      • 1...Bxb3
        • 2.Sf2#
      • 1...Bxd3
        • 2.Sd2#
        • 2.Qxd3#
      • 1...Qb4
        • 2.Sf2#
      • 1...Qa5
        • 2.Sf2#
      • 1...Qa2!
    • 1.Rf6?
      • threat
        • 2.Bxf5#
      • 1...Bxd3+
        • 2.Qxd3#
      • 1...exd4
        • 2.Re6#
      • 1...Qd7!
    • 1.Qe2?
      • threat
        • 2.Sf2#
      • 1...Bxd3
        • 2.Qxd3#
      • 1...Qa1+!
  • Keys
    • 1.Rg6!
      • threat
        • 2.Rg4#
      • 1...Rxf3+
        • 2.Qxf3#
      • 1...Bxd3+
        • 2.Qxd3#
      • 1...exd4
        • 2.Re6#
      • 1...Rg5
        • 2.Rxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(b);N_PINS(E),P_PINS(G),XR(D)::S(E)
    • B(b);CHECK,OGATE,P_PINS(G),XS(E)::QAB1(A),XB(b)
  • Tries
    • Try
      • K(B);N_SPINS(E),P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);XR(D)::S(E)
        • B(b);XR(D)::S(E)
        • Q(a);::S(E)
      • Refutation
        • Q(a);
    • Try
      • R(J);N_PINP(e)
      • Threat
        • B(K),XR(f)
      • Vars
        • B(b);CHECK,OGATE,P_PINS(G),XS(E)::QAB1(A),XB(b)
        • P(e);OGATEB,XB(H)::R(J)
      • Refutation
        • Q(a);
    • Try
      • Q(A);N_SPINS(E),P_SPINS(G)
      • Threat
        • S(E)
      • Vars
        • B(b);OGATE,P_PINQ(A),XS(E)::QAB1(A),XB(b)
      • Refutation
        • Q(a);CHECK
  • Actual
    • R(J);N_PINP(e),N_PINR(f)
    • Threat
      • R(J)
    • Vars
      • R(f);CHECK,OGATE,XS(G)::QAB1(A),XR(f)
      • B(b);CHECK,OGATE,P_PINS(G),XS(E)::QAB1(A),XB(b)
      • P(e);OGATEB,XB(H)::R(J)
      • R(f);OGATEB::B(K)+R(J),XR(f)
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