MESON Chess Problem Database

Problem Display
PID: 177848 (Q6b/3K4/7p/1pR1p3/1p1k4/1Bp1n2r/3N1R2/2N5 w - - 0 1)

Svyatov, Gennadi

Sahs (Latvia), 1983

Q6b/3K4/7p/1pR1p3/1p1k4/1Bp1n2r/3N1R2/2N5

#2

7 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc5
      • 2.Qa7#
  • Tries
    • 1.Se2+?
      • 1...Kxc5
        • 2.Qc6#
        • 2.Qa7#
      • 1...Kd3!
    • 1.Sf3+?
      • 1...Kxc5
        • 2.Qc6#
        • 2.Qa7#
      • 1...Rxf3!
    • 1.Rxc3?
      • threat
        • 2.Se2#
      • 1...Kxc3
        • 2.Qa1#
      • 1...bxc3
        • 2.Qa7#
      • 1...e4
        • 2.Qxh8#
      • 1...Sc4!
    • 1.Rc7?
      • threat
        • 2.Qe4#
        • 2.Qa7#
      • 1...cxd2
        • 2.Rxd2#
      • 1...Sc4
        • 2.Qe4#
      • 1...e4
        • 2.Qxe4#
        • 2.Qxh8#
      • 1...Rh4
        • 2.Sf3#
        • 2.Qa7#
      • 1...Sd5!
    • 1.Rc8?
      • threat
        • 2.Qe4#
        • 2.Qa7#
      • 1...cxd2
        • 2.Rxd2#
      • 1...Sc4
        • 2.Qe4#
      • 1...e4
        • 2.Qxe4#
      • 1...Rh4
        • 2.Sf3#
        • 2.Qa7#
      • 1...Sd5!
  • Keys
    • 1.Rxe5!
      • threat
        • 2.Qe4#
      • 1...Kxe5
        • 2.Qe4#
        • 2.Qxh8#
      • 1...Bxe5
        • 2.Qa7#
      • 1...cxd2
        • 2.Qa1#
      • 1...Sd5
        • 2.Qxd5#
      • 1...c2
        • 2.Qa1#
      • 1...Rh4
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • K(e);OGATEB,S_FLIGHT,XR(E)::QAB(G)
  • Tries
    • Try
      • S(A);CHECK
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • S(B);CHECK
      • Refutation
        • R(c);XS(B)
    • Try
      • R(E);XP(a)
      • Threat
        • S(A)
      • Vars
        • K(e);OGATEB,S_FLIGHT,XR(E)::QAB(G)
        • P(d);SBLOCK,XR(E)::QAB(G)
        • P(g);OGATEB::QAB(G),XB(i)
      • Refutation
        • S(b);
    • Try
      • R(E);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);OGATE,XS(B)::R(C),XP(a)
        • S(b);::QAR1(G)
      • Refutation
        • S(b);
    • Try
      • R(E);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);OGATE,XS(B)::R(C),XP(a)
        • S(b);::QAR1(G)
        • P(g);::QAR1(G),XP(g)
      • Refutation
        • S(b);
  • Actual
    • R(E);XP(g)
    • Threat
      • QAR1(G)
    • Vars
      • B(i);SBLOCK,XR(E)::QAB(G)
      • P(a);OGATEB,XS(B)::QAB(G)
      • S(b);N_GUARD::QAR1(G),XS(b)
      • P(a);OGATEB::QAB(G)
      • R(c);N_GUARD::S(B)
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