MESON Chess Problem Database

Problem Display
PID: 176379 (8/5p2/p4Bq1/4p1NP/4pkBK/2pp2Np/Q4Pr1/7r w - - 0 1)

Lokker, Miklosh S

Metlitski, Vladislav Aleksandrovich

Schach-Echo, 1972

8/5p2/p4Bq1/4p1NP/4pkBK/2pp2Np/Q4Pr1/7r

#2

8 + 11

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxh5+
      • 2.Sxh5#
    • 1...Qxg5+
      • 2.Bxg5#
    • 1...Ra1
      • 2.Sxh3#
    • 1...Rb1
      • 2.Sxh3#
    • 1...Rc1
      • 2.Sxh3#
    • 1...Rd1
      • 2.Sxh3#
    • 1...Re1
      • 2.Sxh3#
    • 1...Rf1
      • 2.Sxh3#
    • 1...Rhg1
      • 2.Sxh3#
    • 1...Rxf2
      • 2.Qxf2#
    • 1...d2
      • 2.Se2#
    • 1...h2
      • 2.Sh3#
  • Tries
    • 1.Qe6?
      • threat
        • 2.Bxe5#
        • 2.Qxe5#
      • 1...Qxh5+
        • 2.Sxh5#
      • 1...Qxg5+
        • 2.Bxg5#
      • 1...Qxf6
        • 2.Qxf6#
      • 1...fxe6
        • 2.Sxe6#
      • 1...Qf5
        • 2.Qxf5#
      • 1...Qg7
        • 2.Qf5#
        • 2.Qxe5#
      • 1...Rxf2!
    • 1.Qd2+?
      • 1...e3
        • 2.Qxe3#
        • 2.fxe3#
      • 1...cxd2!
    • 1.hxg6?
      • threat
        • 2.Sh5#
      • 1...Rxf2
        • 2.Qxf2#
      • 1...fxg6
        • 2.Se6#
      • 1...Rxg3!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qe3#
      • 1...Qxh5+
        • 2.Sxh5#
      • 1...Qxg5+
        • 2.Bxg5#
      • 1...Rxf2
        • 2.Qxf2#
      • 1...Rxg3
        • 2.fxg3#
      • 1...dxe2
        • 2.Sxe2#
      • 1...Re1
        • 2.Sxh3#
      • 1...e3
        • 2.Qf3#
        • 2.Qxe3#
        • 2.fxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(j);CHECK,XP(G)::S(C),XQ(j)
    • Q(j);CHECK,OGATE,XS(F)::B(H),XQ(j)
    • R(a);N_GUARD::S(F),XP(e)
    • R(b);OGATE,XP(B)::QAR2(A),XR(b)
    • P(d);N_GUARD::S(C)
    • P(e);S_CUTR(a)::S(F)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(j);CHECK,XP(G)::S(C),XQ(j)
        • Q(j);CHECK,OGATE,XS(F)::B(H),XQ(j)
        • Q(j);OGATE,P_PINS(F),XB(H)::QAR2(A),XQ(j)
        • P(k);XQ(A)::S(F),XP(k)
        • Q(j);N_GUARD::QAR1(A),XQ(j)
      • Refutation
        • R(b);XP(B)
    • Try
      • Q(A);CHECK
      • Refutation
        • P(c);XQ(A)
    • Try
      • P(G);XQ(j)
      • Threat
        • S(C)
      • Vars
        • R(b);OGATE,XP(B)::QAR2(A),XR(b)
        • P(k);N_GUARD,XP(G)::S(F)
      • Refutation
        • R(b);XS(C)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • Q(j);CHECK,XP(G)::S(C),XQ(j)
      • Q(j);CHECK,OGATE,XS(F)::B(H),XQ(j)
      • R(b);OGATE,XP(B)::QAR2(A),XR(b)
      • R(b);OGATE,XS(C)::P(B),XR(b)
      • P(d);XQ(A)::S(C),XP(d)
      • R(a);N_GUARD::S(F),XP(e)
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