MESON Chess Problem Database

Problem Display
PID: 251120 (8/1BRP4/3p4/Kp2P3/1p1k1B1n/1P1P1p2/1P3P2/3Q1n2 w - - 0 1)

Janevski, Zivko

Uralski Problemist, 2012

8/1BRP4/3p4/Kp2P3/1p1k1B1n/1P1P1p2/1P3P2/3Q1n2

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.fxe3#
    • 1...dxe5
      • 2.d8Q#
      • 2.d8R#
  • Tries
    • 1.Qxf3?
      • threat
        • 2.Qe4#
        • 2.Qd5#
      • 1...Se3
        • 2.Qe4#
        • 2.Qxe3#
      • 1...Sd2
        • 2.Qd5#
        • 2.Qe3#
      • 1...Sg3
        • 2.Qd5#
        • 2.Qe3#
      • 1...d5
        • 2.Qxd5#
      • 1...Sxf3!
    • 1.Qe1?
      • threat
        • 2.Qe4#
      • 1...Kxd3
        • 2.Qe4#
      • 1...Sd2
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sg3
        • 2.Qe3#
      • 1...d5!
    • 1.d8Q?
      • threat
        • 2.Qxd6#
      • 1...Se3
        • 2.fxe3#
      • 1...d5
        • 2.Qxd5#
      • 1...Sf5!
    • 1.d8R?
      • threat
        • 2.Rxd6#
      • 1...Se3
        • 2.fxe3#
      • 1...d5
        • 2.Rxd5#
      • 1...Sf5!
  • Keys
    • 1.Rc5!
      • threat
        • 2.Rd5#
      • 1...Kxc5
        • 2.d4#
      • 1...dxc5
        • 2.d8Q#
        • 2.d8R#
      • 1...Se3
        • 2.Bxe3#
      • 1...d5
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);OGATE::P(C),XS(a)
    • P(g);XP(H)::P=Q
  • Tries
    • Try
      • Q(A);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • P(g);::QAR1(A),XP(g)
      • Refutation
        • S(e);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(d);P-FLIGHT,XP(E)::QAB1(A)
        • S(a);N_GUARD::QAB1(A)
        • S(a);N_GUARD::QAB1(A),XS(a)
      • Refutation
        • P(g);
    • Try
      • P(K);P_PINP(g)
      • Threat
        • QAR2(K),XP(g)
      • Vars
        • S(a);OGATE::P(C),XS(a)
        • P(g);OGATE::QAR1(K),XP(g)
      • Refutation
        • S(e);
    • Try
      • P(K);P_PINP(g)
      • Threat
        • R(K),XP(g)
      • Vars
        • S(a);OGATE::P(C),XS(a)
        • P(g);OGATE::R1(K),XP(g)
      • Refutation
        • S(e);
  • Actual
    • R(J);
    • Threat
      • R1(J)
    • Vars
      • K(d);OGATE,S_FLIGHT,XR(J)::P(E)
      • P(g);SBLOCK,XR(J)::P=Q
      • S(a);N_GUARD::B(F),XS(a)
      • P(g);::R1(J),XP(g)
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