MESON Chess Problem Database

Problem Display
PID: 255354 (2b1K3/3nQ3/1p3Pp1/5kP1/3p3R/8/4BNR1/1qb5 w - - 0 1)

Shire, David J

Problemist Ukraini, 2021

2b1K3/3nQ3/1p3Pp1/5kP1/3p3R/8/4BNR1/1qb5

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Bd3#
      • 2.Qe4#
    • 1...Qd3
      • 2.Bxd3#
    • 1...Qe4
      • 2.Qxe4#
    • 1...Qa1
      • 2.Bd3#
      • 2.Qe4#
    • 1...Qb2
      • 2.Bd3#
      • 2.Qe4#
    • 1...Qb3
      • 2.Qe4#
    • 1...Qb4
      • 2.Bd3#
      • 2.Qe4#
    • 1...Qb5
      • 2.Qe4#
    • 1...Sxf6+
      • 2.Qxf6#
    • 1...d3
      • 2.Qe4#
  • Tries
    • 1.Sh3?
      • threat
        • 2.Bg4#
      • 1...Sxf6+
        • 2.Qxf6#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Se5!
    • 1.Se4?
      • threat
        • 2.Sd6#
      • 1...Sxf6+
        • 2.Qxf6#
      • 1...Qxe4
        • 2.Qxe4#
      • 1...Ba3
        • 2.Rf2#
      • 1...Bf4
        • 2.Bg4#
      • 1...Qb4!
    • 1.Bg4+?
      • 1...Kf4
        • 2.Sh3#
      • 1...Kxg5!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Qe4#
      • 1...Sxf6+
        • 2.Qxf6#
      • 1...Qxd3
        • 2.Bxd3#
      • 1...Bxg5
        • 2.Bg4#
      • 1...Bf4
        • 2.Rxf4#
      • 1...Bb7
        • 2.Qxd7#
      • 1...Sc5
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • Q(a);N_GUARD::B(A),XQ(a)
    • Q(a);N_GUARD,P_PINQ(G)::QAB1(G),XQ(a)
    • Q(a);N_GUARD::QAB1(G)
    • S(g);CHECK,OGATE,XP(F)::QAR1(G),XS(g)
    • P(c);S_CUTQ(a)::QAB1(G)
  • Tries
    • Try
      • S(B);
      • Threat
        • B(A)
      • Vars
        • S(g);CHECK,OGATE,XP(F)::QAR1(G),XS(g)
        • Q(a);N_GUARD,P_PINQ(G)::QAB1(G),XQ(a)
      • Refutation
        • S(g);
    • Try
      • S(B);
      • Threat
        • S(B)
      • Vars
        • S(g);CHECK,OGATE,XP(F)::QAR1(G),XS(g)
        • Q(a);OGATE,P_PINQ(G),XS(B)::QAB1(G),XQ(a)
        • B(b);N_GUARD::R(C)
        • B(b);SBLOCK::B(A)
      • Refutation
        • Q(a);
    • Try
      • B(A);CHECK
      • Vars
        • K(d);P-FLIGHT::S(B)
      • Refutation
        • K(d);P-FLIGHT,XP(E)
  • Actual
    • S(B);
    • Threat
      • QAB1(G)
    • Vars
      • S(g);CHECK,OGATE,XP(F)::QAR1(G),XS(g)
      • Q(a);OGATE,XS(B)::B(A),XQ(a)
      • B(b);SBLOCK,XP(E)::B(A)
      • B(b);N_GUARD::R1(D),XB(b)
      • B(h);N_GUARD::QAB(G),XS(g)
      • S(g);N_GUARD::QAR1(G)
      • S(g);N_GUARD::QAR1(G),XS(g)
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