MESON Chess Problem Database
Problem Display
PID: 18247 (1b4Q1/3pKnRp/P2pnP2/pB1k4/1P4N1/5P2/1pN1R3/q3r1B1 w - - 0 1)
Roscher, Willy
3rd Prize, Schach, 1954
#2
12 + 11
SOLUTION
- SOUND
- Sets
- 1...Ba7
- 2.Qa8#
- 1...Bc7
- 2.Qa8#
- 1...Sd4
- 2.Sce3#
- 1...Sf4
- 2.Rg5#
- 1...Sc5
- 2.Rg5#
- 1...Seg5
- 2.Rxg5#
- 1...Sc7
- 2.Rg5#
- 1...Sed8
- 2.Rg5#
- 1...Sf8
- 2.Rg5#
- 1...Se5
- 2.Sge3#
- 1...Sfg5
- 2.Rd2#
- 2.Rxg5#
- 1...Sh6
- 2.Rd2#
- 1...Sfd8
- 2.Rd2#
- 2.Rg5#
- 1...Sh8
- 2.Rd2#
- 2.Rg5#
- 1...axb4
- 2.Sxb4#
- 1...Ba7
- Tries
- 1.Rg5+?
- 1...Se5
- 2.Sge3#
- 2.Rd2#
- 1...Sfxg5
- 2.Rd2#
- 1...Sexg5!
- 1...Se5
- 1.Qc8?
- threat
- 2.Bc4#
- 2.Qb7#
- 2.Qc4#
- 1...Qa2
- 2.Qb7#
- 1...Bc7
- 2.Qb7#
- 2.Qa8#
- 1...Sd4
- 2.Sce3#
- 2.Bc4#
- 2.Qc4#
- 1...Sc7
- 2.Qb7#
- 1...Sed8
- 2.Bc4#
- 2.Qc4#
- 1...Se5
- 2.Sge3#
- 1...Sfd8
- 2.Bc4#
- 2.Qc4#
- 1...Sc5!
- threat
- 1.Rg5+?
- Keys
- 1.a7!
- threat
- 2.a8Q#
- 2.a8B#
- 1...Rxg1
- 2.a8Q#
- 2.a8B#
- 1...Rxe2
- 2.a8Q#
- 2.a8B#
- 1...Bxa7
- 2.Qa8#
- 1...Sxg7
- 2.a8Q#
- 2.a8B#
- 1...axb4
- 2.Sxb4#
- 1...b1Q
- 2.a8Q#
- 2.a8B#
- 1...b1S
- 2.a8Q#
- 2.a8B#
- 1...b1B
- 2.a8Q#
- 2.a8B#
- 1...b1R
- 2.a8Q#
- 2.a8B#
- 1...Qc1
- 2.a8Q#
- 2.a8B#
- 1...Qb1
- 2.a8Q#
- 2.a8B#
- 1...Qd1
- 2.a8Q#
- 2.a8B#
- 1...Qa2
- 2.a8Q#
- 2.a8B#
- 1...Qa3
- 2.a8Q#
- 2.a8B#
- 1...Qa4
- 2.a8Q#
- 2.a8B#
- 1...Rb1
- 2.a8Q#
- 2.a8B#
- 1...Rc1
- 2.a8Q#
- 2.a8B#
- 1...Rd1
- 2.a8Q#
- 2.a8B#
- 1...Rf1
- 2.a8Q#
- 2.a8B#
- 1...Bc7
- 2.Qa8#
- 2.a8Q#
- 2.a8B#
- 1...Sd4
- 2.Sce3#
- 1...Sf4
- 2.Rg5#
- 2.a8Q#
- 2.a8B#
- 1...Sc5
- 2.Rg5#
- 1...Seg5
- 2.Rxg5#
- 2.a8Q#
- 2.a8B#
- 1...Sc7
- 2.Rg5#
- 1...Sed8
- 2.Rg5#
- 1...Sf8
- 2.Rg5#
- 2.a8Q#
- 2.a8B#
- 1...Se5
- 2.Sge3#
- 1...Sfg5
- 2.Rd2#
- 2.Rxg5#
- 2.a8Q#
- 2.a8B#
- 1...Sh6
- 2.Rd2#
- 2.a8Q#
- 2.a8B#
- 1...Sfd8
- 2.Rd2#
- 2.Rg5#
- 1...Sh8
- 2.Rd2#
- 2.Rg5#
- 2.a8Q#
- 2.a8B#
- 1...a4
- 2.a8Q#
- 2.a8B#
- 1...h5
- 2.a8Q#
- 2.a8B#
- 1...h6
- 2.a8Q#
- 2.a8B#
- threat
- 1.a7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 5
- Sets
- B(k);OGATE::QAB(L)
- S(g);P_PINR(C),P_SPINS(i),SBLOCK::S(B)
- S(g);N_GUARD,P_PINR(C),P_SPINS(i)::R(K)
- S(g);N_GUARD,P_PINR(C),P_SPINS(i)::R(K),XS(g)
- S(i);P_SPINS(g),SBLOCK::S(F)
- S(i);P_SPINS(g)::R(C)
- P(d);XP(E)::S(B),XP(d)
- Tries
- Try
- R(K);CHECK
- Vars
- S(i);P_SPINS(g),XR(K)::R(C)
- Refutation
- S(g);P_PINR(C),P_SPINS(i),XR(K)
- Try
- Q(L);
- Threat
- DUALS(3)
- Vars
- Q(a);::QAB(L)
- S(g);P_PINR(C)::QAB(L)
- S(i);SBLOCK::S(F)
- Refutation
- S(g);P_PINR(C)
- Try
- Actual
- P(H);
- Threat
- P=Q
- Vars
- R(b);XB(A)::P=Q
- R(b);XR(C)::P=Q
- B(k);OGATE,XP(H)::QAB(L)
- S(g);P_PINR(C),P_SPINS(i),XR(K)::P=Q
- P(d);XP(E)::S(B),XP(d)
- P(c);::P=Q
- Q(a);::P=Q
- R(b);::P=Q
- S(g);P_PINR(C),P_SPINS(i),SBLOCK::S(B)
- S(g);N_GUARD,P_PINR(C),P_SPINS(i)::R(K)
- S(i);P_SPINS(g),SBLOCK::S(F)
- P(d);::P=Q
- P(j);::P=Q
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).