MESON Chess Problem Database
Problem Display
PID: 190281 (4r3/1b1Q4/8/R4P2/1rpnk3/4N1Bn/3PPRK1/3B4 w - - 0 1)
Jonsson, Gustav
Suomen Shakki, 1983
#2
10 + 7
SOLUTION
- SOUND
- Sets
- 1...Re5
- 2.Rxe5#
- 1...Ra8
- 2.Re5#
- 1...Rb8
- 2.Re5#
- 1...Rc8
- 2.Re5#
- 1...Rd8
- 2.Re5#
- 1...Rf8
- 2.Re5#
- 1...Rg8
- 2.Re5#
- 1...Rh8
- 2.Re5#
- 1...Bd5
- 2.Qxd5#
- 1...Ba6
- 2.Qd5#
- 1...Bc8
- 2.Qd5#
- 1...Sg1
- 2.Rf4#
- 1...Sf4+
- 2.Rxf4#
- 1...Sg5
- 2.Rf4#
- 1...Sc2
- 2.Bxc2#
- 1...Sxe2
- 2.Bc2#
- 1...Sb3
- 2.Bc2#
- 1...Sf3
- 2.Bc2#
- 2.exf3#
- 1...Sb5
- 2.Bc2#
- 1...Sxf5
- 2.Bc2#
- 1...Sc6
- 2.Bc2#
- 2.Qd5#
- 1...Se6
- 2.Bc2#
- 2.Re5#
- 1...Re5
- Tries
- 1.Sxc4?
- threat
- 2.Sd6#
- 2.d3#
- 1...Sf4+
- 2.Rxf4#
- 1...Sxf2
- 2.Sd6#
- 1...Sxe2
- 2.Bc2#
- 2.Rxe2#
- 2.d3#
- 1...Sxf5
- 2.Bc2#
- 2.Qd3#
- 2.d3#
- 1...Rb3
- 2.Sd6#
- 1...Rb5
- 2.d3#
- 1...Rb6
- 2.d3#
- 1...Re6
- 2.d3#
- 1...Sc2
- 2.Bxc2#
- 2.Qd3#
- 2.d3#
- 1...Sb3
- 2.Bc2#
- 2.Qd3#
- 2.d3#
- 1...Sf3
- 2.Bc2#
- 2.Qd3#
- 2.d3#
- 2.exf3#
- 1...Sb5
- 2.Bc2#
- 2.Qd3#
- 2.d3#
- 1...Sc6
- 2.Bc2#
- 2.Qd3#
- 2.Qd5#
- 2.d3#
- 1...Se6
- 2.Bc2#
- 2.Re5#
- 2.Qd3#
- 2.d3#
- 1...Rxc4!
- threat
- 1.Sd5?
- threat
- 2.Sc3#
- 2.Sf6#
- 1...Bxd5
- 2.Qxd5#
- 1...Sxe2
- 2.Sf6#
- 1...Sb5
- 2.Sf6#
- 1...Rb3
- 2.Sf6#
- 1...Rb6
- 2.Sc3#
- 1...Re6
- 2.Sc3#
- 1...Rf8
- 2.Sc3#
- 1...c3
- 2.Sxc3#
- 2.Sf6#
- 2.d3#
- 1...Sf4+!
- threat
- 1.Rd5?
- threat
- 2.Rxd4#
- 1...Sf4+
- 2.Rxf4#
- 1...Bxd5
- 2.Qxd5#
- 1...Sxe2
- 2.Bc2#
- 2.Qxe8#
- 1...Sxf5
- 2.Bc2#
- 2.Qxf5#
- 1...Sc2
- 2.Bxc2#
- 2.Qxe8#
- 1...Sb3
- 2.Bc2#
- 2.Qxe8#
- 1...Sf3
- 2.Bc2#
- 2.exf3#
- 1...Sb5
- 2.Bc2#
- 2.Qxe8#
- 1...Sc6
- 2.Bc2#
- 1...Se6
- 2.Bc2#
- 2.Re5#
- 1...c3!
- threat
- 1.Sxc4?
- Keys
- 1.Sc2!
- threat
- 2.Qxd4#
- 1...Sf4+
- 2.Rxf4#
- 1...Sxc2
- 2.Bxc2#
- 1...Sxe2
- 2.Rxe2#
- 1...Sxf5
- 2.Qxf5#
- 1...Rd8
- 2.Re5#
- 1...Bd5
- 2.Qxd5#
- 1...Sb3
- 2.Qxe8#
- 1...Sf3
- 2.exf3#
- 1...Sb5
- 2.Qxb7#
- 1...Sc6
- 2.Qd5#
- 1...Se6
- 2.Re5#
- 1...c3
- 2.d3#
- threat
- 1.Sc2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 4
- REMOVED MATES = 11
- Sets
- R(g);N_GUARD::R1(H),XR(g)
- R(g);N_GUARD::R1(H)
- R(g);N_GUARD,P_PINB(G)::R1(H)
- B(f);N_GUARD::QAB1(J),XB(f)
- B(f);N_GUARD::QAB1(J)
- S(a);N_GUARD::R1(D)
- S(a);CHECK,N_GUARD::R1(D),XS(a)
- S(d);N_GUARD::B(A),XS(d)
- S(d);N_GUARD,XP(C)::B(A)
- S(d);N_GUARD::B(A)
- S(d);N_GUARD,XP(I)::B(A)
- Tries
- Try
- S(F);XP(c)
- Threat
- DUALS(2)
- Vars
- S(a);CHECK,N_GUARD::R1(D),XS(a)
- S(a);XR(D)::S(F)
- R(b);::S(F)
- R(b);::P(B)
- R(g);::P(B)
- Refutation
- R(b);XS(F)
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- B(f);OGATE,XS(F)::QAB1(J),XB(f)
- S(d);XP(C)::S(F)
- S(d);::S(F)
- R(b);::S(F)
- R(g);::S(F)
- Refutation
- S(a);CHECK
- Try
- R(H);
- Threat
- R1(H),XS(d)
- Vars
- S(a);CHECK,N_GUARD::R1(D),XS(a)
- B(f);OGATE,XR(H)::QAB1(J),XB(f)
- S(d);N_GUARD::B(A)
- Refutation
- P(c);
- Try
- Actual
- S(F);
- Threat
- QAR1(J),XS(d)
- Vars
- S(a);CHECK,N_GUARD::R1(D),XS(a)
- S(d);OGATE,XS(F)::B(A),XS(d)
- S(d);OGATE,XP(C)::R(D),XS(d)
- S(d);OGATE,XP(I)::QAB1(J),XS(d)
- R(g);N_GUARD::R1(H)
- B(f);N_GUARD::QAB1(J),XB(f)
- S(d);N_GUARD::QAR(J),XR(g)
- S(d);OGATE::P(C),XS(d)
- S(d);N_GUARD,S_CUTR(b)::QAB(J),XB(f)
- S(d);S_CUTB(f)::QAB1(J)
- S(d);S_CUTR(g)::R1(H)
- P(c);N_GUARD::P(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).