MESON Chess Problem Database
Problem Display
PID: 169810 (1BB3nQ/p1r5/K1p1N2R/5kPP/2R1bbp1/8/2N5/2nr4 w - - 0 1)
Umnov, Evgeny Ivanovich
Shakhmaty v SSSR, 1945
#2
10 + 10
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Re1
- 2.Scd4#
- 1...Rf1
- 2.Scd4#
- 1...Rg1
- 2.Scd4#
- 1...Rh1
- 2.Scd4#
- 1...Rd4
- 2.Scxd4#
- 1...Rh7
- 2.Qxh7#
- 1...Rxc8
- 2.Qh7#
- 1...Bh1
- 2.Rxf4#
- 1...Bxc2
- 2.Rxf4#
- 1...Bg2
- 2.Rxf4#
- 1...Bf3
- 2.Rxf4#
- 1...Bd5
- 2.Rxf4#
- 1...Bd2
- 2.Scd4#
- 1...Bh2
- 2.Se3#
- 1...Be3
- 2.Sxe3#
- 1...Bg3
- 2.Se3#
- 1...Be5
- 2.Se3#
- 1...Bd6
- 2.Se3#
- 1...Sd3
- 2.Scd4#
- 1...Sf6
- 2.Qxf6#
- 1...Sxh6
- 2.Qf6#
- 1...Se7
- 2.Qf6#
- 1...Re1
- Tries
- 1.Rc5+?
- 1...Rd5
- 2.Scd4#
- 1...Be5
- 2.Se3#
- 2.Rxe5#
- 2.Qxe5#
- 1...Bd5!
- 1...Rd5
- 1.Rf6+?
- 1...Sxf6
- 2.Qxf6#
- 1...Ke5!
- 1...Sxf6
- 1.Qe5+?
- 1...Bxe5
- 2.Se3#
- 1...Kxe5!
- 1...Bxe5
- 1.Qg7?
- threat
- 2.Sed4#
- 1...Rxc8
- 2.Qg6#
- 2.Qh7#
- 1...Bxc2
- 2.Rxf4#
- 1...Bxg5
- 2.Qxg5#
- 1...Sf6
- 2.Qxf6#
- 1...Rd4
- 2.Scxd4#
- 2.Sexd4#
- 1...Rcd7
- 2.Qg6#
- 1...Bh1
- 2.Rxf4#
- 1...Bg2
- 2.Rxf4#
- 1...Bd3
- 2.Sxc7#
- 1...Bf3
- 2.Rxf4#
- 1...Bd5
- 2.Rxf4#
- 1...Bd2
- 2.Scd4#
- 1...Bh2
- 2.Se3#
- 1...Be3
- 2.Sxe3#
- 1...Bg3
- 2.Se3#
- 1...Be5
- 2.Se3#
- 2.Qg6#
- 1...Bd6
- 2.Se3#
- 1...Rxg7!
- threat
- 1.Rc5+?
- Keys
- 1.Rg6!
- threat
- 2.Sed4#
- 1...Rxc8
- 2.Sg7#
- 1...Bxc2
- 2.Rxf4#
- 1...Bxg5
- 2.Rxg5#
- 1...Sf6
- 2.Qxf6#
- 1...Rd4
- 2.Scxd4#
- 2.Sexd4#
- 1...Rcd7
- 2.Sg7#
- 1...Bh1
- 2.Rxf4#
- 1...Bg2
- 2.Rxf4#
- 1...Bd3
- 2.Sxc7#
- 1...Bf3
- 2.Rxf4#
- 1...Bd5
- 2.Rxf4#
- 1...Bd2
- 2.Scd4#
- 1...Bh2
- 2.Se3#
- 1...Be3
- 2.Sxe3#
- 1...Bg3
- 2.Se3#
- 1...Be5
- 2.Se3#
- 1...Bd6
- 2.Se3#
- threat
- 1.Rg6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 9
- Sets
- R(b);N_GUARD::S(A)
- R(b);N_GUARD::S(A),XR(b)
- R(i);N_GUARD::QAB(J),XR(i)
- R(i);N_GUARD,XB(I)::QAB(J)
- B(c);OGATE::R1(B),XB(d)
- B(c);OGATE,XS(A)::R1(B),XB(d)
- B(d);S_CUTR(b)::S(A)
- B(d);N_GUARD::S(A)
- B(d);N_GUARD::S(A),XB(d)
- S(a);S_CUTR(b)::S(A)
- S(j);N_GUARD::QAR1(J),XS(j)
- S(j);N_GUARD,XR(G)::QAR1(J)
- S(j);N_GUARD::QAR1(J)
- Tries
- Try
- R(B);CHECK
- Vars
- R(b);P_SPINR(b)::S(A)
- Refutation
- B(c);P_SPINB(c)
- Try
- R(G);CHECK
- Vars
- S(j);OGATE,XR(G)::QAR1(J),XS(j)
- Refutation
- K(f);P-FLIGHT,P_SPINR(i)
- Try
- Q(J);CHECK
- Vars
- B(d);SBLOCK,XQ(J)::S(A)
- Refutation
- K(f);P-FLIGHT,P_SPINR(i),XQ(J)
- Try
- Q(J);
- Threat
- B(I)+S(F),DCHECK
- Vars
- B(c);OGATE,XS(A)::R1(B),XB(d)
- B(d);OGATE,XP(C)::QAR1(J),XB(d)
- S(j);N_GUARD::QAR1(J),XS(j)
- R(i);::QAB1(J)
- B(c);OGATE::R1(B),XB(d)
- B(c);P_PINR(B),S_CUTR(b)::B(I)+S(F),XR(i)
- B(d);S_CUTR(b)::S(A)
- B(d);N_GUARD::S(A)
- B(d);N_GUARD::S(A),XB(d)
- Refutation
- R(i);XQ(J)
- Try
- Actual
- R(G);
- Threat
- B(I)+S(F),DCHECK
- Vars
- R(i);XB(I)::S(F)
- B(c);OGATE,XS(A)::R1(B),XB(d)
- B(d);OGATE,XP(C)::R1(G),XB(d)
- S(j);N_GUARD::QAR1(J),XS(j)
- R(i);::S(F)
- B(c);OGATE::R1(B),XB(d)
- B(c);P_PINR(B),S_CUTR(b)::B(I)+S(F),XR(i)
- B(d);S_CUTR(b)::S(A)
- B(d);N_GUARD::S(A)
- B(d);N_GUARD::S(A),XB(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).