MESON Chess Problem Database

Problem Display
PID: 96721 (4R3/3PK3/3P2p1/QN2k1r1/2P3pB/p2pN1P1/6P1/1n3r2 w - - 0 1)

Stojnic, Dragan

Best Problems, 2003

4R3/3PK3/3P2p1/QN2k1r1/2P3pB/p2pN1P1/6P1/1n3r2

#2

11 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Kf7#
    • 1...Rd1
      • 2.Kf7#
    • 1...Re1
      • 2.Kf7#
    • 1...Rg1
      • 2.Kf7#
    • 1...Rh1
      • 2.Kf7#
    • 1...Rf7+
      • 2.Kxf7#
    • 1...Rf5
      • 2.Kd8#
    • 1...Rh5
      • 2.Kd8#
  • Tries
    • 1.Bxg5?
      • threat
        • 2.Kd8#
      • 1...Rf7+
        • 2.Kxf7#
      • 1...Ke4
        • 2.Kd8#
      • 1...Rf8
        • 2.Kxf8#
      • 1...Rf6!
    • 1.Qc3+?
      • 1...Ke4
        • 2.Qd4#
      • 1...Sxc3!
    • 1.Qb6?
      • threat
        • 2.Qd4#
      • 1...Rf7+
        • 2.Kxf7#
      • 1...Ke4
        • 2.Qd4#
      • 1...Rf4!
    • 1.Qa7?
      • threat
        • 2.Qd4#
      • 1...Rf7+
        • 2.Kxf7#
      • 1...Ke4
        • 2.Qd4#
      • 1...Rf4!
    • 1.Qa8?
      • threat
        • 2.Qd5#
      • 1...Rf7+
        • 2.Kxf7#
      • 1...Sc3!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Sc3#
      • 1...Ke4
        • 2.Kf6#
      • 1...Kxf5
        • 2.Sc3#
      • 1...Rfxf5
        • 2.Qe1#
      • 1...Rgxf5
        • 2.Kd8#
      • 1...gxf5
        • 2.Kf7#
      • 1...Sc3
        • 2.Sxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • R(b);::R(K)+K(J)
    • R(b);CHECK::R(K)+K(J),XR(b)
    • R(g);::R(K)+K(J)
  • Tries
    • Try
      • B(E);XR(g)
      • Threat
        • R(K)+K(J)
      • Vars
        • R(b);CHECK::R(K)+K(J),XR(b)
        • K(f);P-FLIGHT::R(K)+K(J)
        • R(b);::R(K)+K(J),XR(b)
      • Refutation
        • R(b);
    • Try
      • Q(F);CHECK
      • Vars
        • K(f);P-FLIGHT::QAR1(F)
      • Refutation
        • S(a);XQ(F)
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Vars
        • R(b);CHECK::R(K)+K(J),XR(b)
        • K(f);P-FLIGHT::QAR1(F)
      • Refutation
        • R(b);
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Vars
        • R(b);CHECK::R(K)+K(J),XR(b)
        • K(f);P-FLIGHT::QAR1(F)
      • Refutation
        • R(b);
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • R(b);CHECK::R(K)+K(J),XR(b)
      • Refutation
        • S(a);
  • Actual
    • S(B);
    • Threat
      • QAR(F)+S(G)
    • Vars
      • K(f);P-FLIGHT::R(K)+K(J)
      • K(f);P-FLIGHT,XS(B)::QAR(F)+S(G)
      • R(b);N_GUARD,SBLOCK,XS(B)::QAR(F)
      • R(g);SBLOCK,XS(B)::R(K)+K(J)
      • P(h);SBLOCK,XS(B)::R(K)+K(J)
      • S(a);::QAR(F)+S(G),XS(a)
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