MESON Chess Problem Database
Problem Display
PID: 266813 (5r2/2BPp2B/2R1N3/1P1krq1Q/R5p1/1n2pbn1/2P3Nb/4K3 w - - 0 1)
Castellari, Umberto
L'Italia Scacchistica, 1950
#2
11 + 11
| 15601 | Albrecht-Leiss-Degener Collection | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Qxc2
- 2.Sxe3#
- 2.Qxe5#
- 1...Qd3
- 2.Qxe5#
- 1...Qxe6
- 2.Sxe3#
- 1...Qg6
- 2.Sxe3#
- 2.Qxe5#
- 1...Qxh7
- 2.Sxe3#
- 2.Qxe5#
- 1...Qg5
- 2.c4#
- 1...Qxh5
- 2.c4#
- 1...Qf6
- 2.Sxe3#
- 2.c4#
- 1...Qf7
- 2.Sxe3#
- 2.Qxe5#
- 2.c4#
- 1...Rxe6
- 2.Sf4#
- 1...Rf6
- 2.d8Q#
- 2.d8R#
- 1...Rf7
- 2.d8Q#
- 2.d8R#
- 1...Be4
- 2.Sxe3#
- 2.c4#
- 1...Sa1
- 2.Rd4#
- 1...Sc1
- 2.Rd4#
- 1...Sd2
- 2.Rd4#
- 1...Sd4
- 2.Rxd4#
- 1...Sa5
- 2.Rd4#
- 1...Sc5
- 2.Rd4#
- 1...Se4
- 2.Sxe3#
- 2.c4#
- 1...Qxc2
- Tries
- 1.Bxf5?
- threat
- 2.Sgf4#
- 2.Sef4#
- 2.c4#
- 1...Rexf5
- 2.Sxe3#
- 2.Sgf4#
- 2.Sef4#
- 1...Rxe6
- 2.Sf4#
- 2.Be4#
- 2.Bxe6#
- 1...Rfxf5
- 2.d8Q#
- 2.d8R#
- 1...Bxg2
- 2.Sf4#
- 2.c4#
- 1...Sxh5
- 2.c4#
- 1...Re4
- 2.Bxe4#
- 1...Be2
- 2.Sgf4#
- 2.Sef4#
- 1...Sd2
- 2.Sgf4#
- 2.Sef4#
- 2.Rd4#
- 2.Rc5#
- 1...Sa5
- 2.Sgf4#
- 2.Sef4#
- 2.Rd4#
- 2.Rc5#
- 1...Sf1
- 2.c4#
- 1...Sh1
- 2.c4#
- 1...Se2
- 2.c4#
- 1...Se4
- 2.Sxe3#
- 2.c4#
- 1...Sxf5!
- threat
- 1.Bg8?
- threat
- 2.Sef4#
- 1...Qxe6
- 2.Sxe3#
- 2.Bxe6#
- 2.Qxe5#
- 1...Rxe6
- 2.Sxe3#
- 2.Sf4#
- 2.Bxe6#
- 1...Sd4
- 2.Rxd4#
- 1...Qf4
- 2.Sexf4#
- 1...Rf7
- 2.d8Q#
- 2.d8R#
- 1...Rxg8!
- threat
- 1.Qxf5?
- threat
- 2.Sxe3#
- 2.Sgf4#
- 2.Sef4#
- 2.Qxe5#
- 2.c4#
- 1...Rexf5
- 2.Sxe3#
- 1...Rfxf5
- 2.d8Q#
- 2.d8R#
- 1...Bxg2
- 2.Sf4#
- 2.Qxe5#
- 2.c4#
- 1...Bg1
- 2.Sgf4#
- 2.Sef4#
- 2.Qxe5#
- 2.c4#
- 1...Be2
- 2.Sxe3#
- 2.Sgf4#
- 2.Sef4#
- 2.Qxe5#
- 1...Sd2
- 2.Sxe3#
- 2.Sgf4#
- 2.Sef4#
- 2.Rd4#
- 2.Rc5#
- 2.Qd3#
- 2.Qxe5#
- 1...Sa5
- 2.Sxe3#
- 2.Sgf4#
- 2.Sef4#
- 2.Rd4#
- 2.Rc5#
- 2.Qd3#
- 2.Qxe5#
- 1...Sf1
- 2.c4#
- 1...Sh1
- 2.Sxe3#
- 2.c4#
- 1...Se2
- 2.Sxe3#
- 2.c4#
- 1...Se4
- 2.Sxe3#
- 2.c4#
- 1...Sh5
- 2.Sxe3#
- 2.c4#
- 1...e2
- 2.Se3#
- 2.Sgf4#
- 2.Sef4#
- 2.Qxe5#
- 2.c4#
- 1...Sxf5!
- threat
- 1.Bxf5?
- Keys
- 1.Qf7!
- threat
- 2.Sef4#
- 1...Qxe6
- 2.Sf4#
- 1...Qxf7
- 2.c4#
- 1...Rxe6
- 2.Sxe3#
- 1...Rxf7
- 2.d8Q#
- 2.d8R#
- 1...Sd4
- 2.Rxd4#
- 1...Qf4
- 2.Sgxf4#
- 2.Sexf4#
- threat
- 1.Qf7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 8
- Sets
- Q(i);OGATE,P_SPINR(h)::QAR1(F),XR(h)
- Q(i);P_SPINR(h),XS(H)::S(C),XP(c)
- Q(i);::P(B)
- Q(i);XQ(F)::P(B)
- R(h);P_SPINQ(i),XS(H)::S(C)
- R(k);N_GUARD::P=Q
- S(b);N_GUARD::R1(D)
- S(b);N_GUARD::R1(D),XS(b)
- Tries
- Try
- B(K);XQ(i)
- Threat
- DUALS(3)
- Vars
- R(k);N_GUARD,XB(K)::P=Q
- S(e);XQ(F)::P(B)
- R(h);::QAR(F)+B(K),DCHECK,XR(h)
- S(e);::P(B)
- Refutation
- S(e);XB(K)
- Try
- B(K);
- Threat
- B(K)+S(H),DCHECK
- Vars
- S(b);N_GUARD::R1(D),XS(b)
- Q(i);P_SPINR(h)::B(K)+S(H),DCHECK,XQ(i)
- R(k);N_GUARD::P=Q
- Refutation
- R(k);XB(K)
- Try
- Q(F);P_PINR(h),XQ(i)
- Threat
- DUALS(5)
- Vars
- R(h);N_SPINR(h),XQ(F)::S(C),XP(c)
- R(k);N_GUARD,N_SPINR(h),XQ(F)::P=Q
- S(e);::P(B)
- Refutation
- S(e);N_SPINR(h),XQ(F)
- Try
- Actual
- Q(F);
- Threat
- QAB(F)+S(H),DCHECK
- Vars
- Q(i);N_GUARD,P_SPINQ(i),XS(H)::S(C)
- Q(i);XQ(F)::P(B)
- R(h);N_GUARD,P_SPINR(h),XS(H)::S(C),XP(c)
- R(k);N_GUARD,XQ(F)::P=Q
- S(b);N_GUARD::R1(D),XS(b)
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).