MESON Chess Problem Database
Problem Display
PID: 43926 (8/1bqpR1K1/3BpQ1p/4n3/3b4/1Np1kN2/2B1p2R/7n w - - 0 1)
Umnov, Evgeny Ivanovich
Het Schaakleven, 1931
#2
8 + 11
SOLUTION
- SOUND
- Sets
- 1...Bxf3
- 2.Qxh6#
- 1...Bxf3
- Tries
- 1.Sbxd4?
- threat
- 2.Rxe2#
- 2.Qxh6#
- 1...Sxf3
- 2.Rxe2#
- 2.Qf4#
- 1...Sd3
- 2.Rxe2#
- 1...e1Q
- 2.Qxh6#
- 1...e1S
- 2.Re2#
- 2.Qxh6#
- 1...e1B
- 2.Re2#
- 2.Qxh6#
- 1...e1R
- 2.Qxh6#
- 1...Qc4
- 2.Qxh6#
- 1...Ba6
- 2.Qxe5#
- 2.Qxh6#
- 1...Sf2
- 2.Qxh6#
- 1...Sg3
- 2.Qxh6#
- 1...Sg4
- 2.Rxe2#
- 2.Qf4#
- 1...Sg6
- 2.Rxe2#
- 1...Sf7
- 2.Rxe2#
- 2.Qf4#
- 1...h5
- 2.Rxe2#
- 2.Qg5#
- 2.Qh6#
- 1...Bxf3!
- threat
- 1.Se1?
- threat
- 2.Qxh6#
- 1...Sd3
- 2.Qxd4#
- 1...Bg2
- 2.Sxg2#
- 1...Sc4
- 2.Qxd4#
- 1...Sg4
- 2.Qxd4#
- 1...Sc6
- 2.Sg2#
- 1...Sg6
- 2.Qxd4#
- 1...Sf7
- 2.Qxd4#
- 1...h5
- 2.Qg5#
- 2.Qh6#
- 1...Sf3!
- threat
- 1.Sg1?
- threat
- 2.Rxe2#
- 2.Qxh6#
- 1...Sd3
- 2.Rxe2#
- 2.Qxd4#
- 1...e1Q
- 2.Qxh6#
- 1...e1S
- 2.Re2#
- 2.Qxh6#
- 1...e1B
- 2.Re2#
- 2.Qxh6#
- 1...e1R
- 2.Qxh6#
- 1...Qc4
- 2.Qxh6#
- 1...Bf3
- 2.Qxh6#
- 1...Ba6
- 2.Qxh6#
- 1...Sf2
- 2.Qxf2#
- 2.Qxh6#
- 1...Sg3
- 2.Qf2#
- 2.Qxh6#
- 1...Sf3
- 2.Rxe2#
- 1...Sc4
- 2.Rxe2#
- 2.Qxd4#
- 1...Sg4
- 2.Rxe2#
- 2.Qxd4#
- 1...Sc6
- 2.Rxe2#
- 1...Sg6
- 2.Rxe2#
- 2.Qxd4#
- 1...Sf7
- 2.Rxe2#
- 2.Qxd4#
- 1...h5
- 2.Rxe2#
- 2.Qg5#
- 2.Qh6#
- 1...Bg2!
- threat
- 1.Sfxd4?
- threat
- 2.Rxe2#
- 2.Qxh6#
- 1...Sd3
- 2.Rxe2#
- 1...e1Q
- 2.Qxh6#
- 1...e1S
- 2.Re2#
- 2.Qxh6#
- 1...e1B
- 2.Re2#
- 2.Qxh6#
- 1...e1R
- 2.Qxh6#
- 1...Qc4
- 2.Qxh6#
- 1...Bf3
- 2.Qxh6#
- 1...Ba6
- 2.Qxe5#
- 2.Qxh6#
- 1...Sf2
- 2.Qxf2#
- 2.Qxh6#
- 1...Sg3
- 2.Qf2#
- 2.Qxh6#
- 1...Sf3
- 2.Sf5#
- 2.Rxe2#
- 2.Qf4#
- 1...Sg4
- 2.Rxe2#
- 2.Qf4#
- 1...Sg6
- 2.Rxe2#
- 1...Sf7
- 2.Rxe2#
- 2.Qf4#
- 1...h5
- 2.Rxe2#
- 2.Qg5#
- 2.Qh6#
- 1...Bg2!
- threat
- 1.Sxe5?
- threat
- 2.Sg4#
- 2.Qxh6#
- 1...Bg2
- 2.Sg4#
- 1...Bf3
- 2.Qxf3#
- 2.Qxh6#
- 1...Sf2
- 2.Qxf2#
- 2.Qxh6#
- 1...h5
- 2.Qg5#
- 2.Qh6#
- 1...Bxe5!
- threat
- 1.Qg5+?
- 1...Kxf3
- 2.Sxd4#
- 1...hxg5!
- 1...Kxf3
- 1.Sbxd4?
- Keys
- 1.Sh4!
- threat
- 2.Qxh6#
- 1...Sd3
- 2.Qxd4#
- 1...Bg2
- 2.Sxg2#
- 1...Sf3
- 2.Sf5#
- 1...Sc4
- 2.Qxd4#
- 1...Sg4
- 2.Qxd4#
- 1...Sc6
- 2.Sg2#
- 1...Sg6
- 2.Qxd4#
- 1...Sf7
- 2.Qxd4#
- 1...h5
- 2.Qg5#
- 2.Qh6#
- threat
- 1.Sh4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 8
- REMOVED MATES = 1
- Sets
- B(i);SBLOCK,XS(D)::QAB(F),XP(h)
- Tries
- Try
- S(C);XB(e)
- Threat
- DUALS(2)
- Vars
- S(f);P_SPINP(g)::R1(B),XP(b)
- P(b);::QAB(F),XP(h)
- Q(j);::QAB(F),XP(h)
- S(a);::QAB(F),XP(h)
- Refutation
- B(i);XS(D)
- Try
- S(D);
- Threat
- QAB(F),XP(h)
- Vars
- S(f);OGATE,P_PINQ(F),P_SPINP(g)::QAB1(F),XB(e)
- B(i);N_GUARD::S(D),XB(i)
- S(f);P_PINQ(F),P_SPINP(g),S_CUTB(i)::S(D)
- Refutation
- S(f);P_PINQ(F),P_SPINP(g)
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- P(b);::QAB(F),XP(h)
- Q(j);::QAB(F),XP(h)
- B(i);::QAB(F),XP(h)
- S(f);P_PINQ(F),P_SPINP(g)::R1(B),XP(b)
- Refutation
- B(i);
- Try
- S(D);XB(e)
- Threat
- DUALS(2)
- Vars
- S(f);P_SPINP(g)::R1(B),XP(b)
- P(b);::QAB(F),XP(h)
- Q(j);::QAB(F),XP(h)
- B(i);::QAB(F),XP(h)
- Refutation
- B(i);
- Try
- S(D);XS(f)
- Threat
- DUALS(2)
- Vars
- B(i);::S(D)
- Refutation
- B(e);P_PINQ(F),XS(D)
- Try
- Q(F);CHECK
- Vars
- K(d);P-FLIGHT,XS(D)::S(C),XB(e)
- Refutation
- P(h);XQ(F)
- Try
- Actual
- S(D);
- Threat
- QAB(F),XP(h)
- Vars
- S(f);OGATE,P_PINQ(F),P_SPINP(g)::QAB1(F),XB(e)
- B(i);N_GUARD::S(D),XB(i)
- S(f);P_PINQ(F),P_SPINP(g),SBLOCK::S(D)
- S(f);P_PINQ(F),P_SPINP(g),S_CUTB(i)::S(D)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).