MESON Chess Problem Database
Problem Display
PID: 258856 (4R1br/2R4q/4PP1Q/1P1kB3/n2P4/n5Np/7P/5BK1 w - - 0 1)
Buchwald, Julius
Probleemblad, 1948
#2
12 + 7
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Rd7#
- 1...Qc2
- 2.Rd7#
- 1...Qe4
- 2.Rd7#
- 1...Qf5
- 2.Rd7#
- 1...Qg6
- 2.Rd7#
- 1...Qxh6
- 2.Rd7#
- 1...Qd7
- 2.Rxd7#
- 1...Bf7
- 2.Rd7#
- 1...Sb1
- 2.Bc4#
- 1...Sc2
- 2.Bc4#
- 1...Sc4
- 2.Bxc4#
- 1...Sxb5
- 2.Bc4#
- 1...Sb2
- 2.Rc5#
- 1...Sc3
- 2.Rc5#
- 1...Sc5
- 2.Rxc5#
- 1...Sb6
- 2.Rc5#
- 1...Qb1
- Tries
- 1.Bg2+?
- 1...Qe4
- 2.Bxe4#
- 1...hxg2!
- 1...Qe4
- 1.Rd8+?
- 1...Kxe6
- 2.Rd6#
- 1...Qd7!
- 1...Kxe6
- 1.Qc1?
- threat
- 2.Qc6#
- 1...Qc2
- 2.Rd7#
- 1...Qd7
- 2.Rxd7#
- 1...Sc2
- 2.Bc4#
- 1...Sc4
- 2.Bxc4#
- 2.Qxc4#
- 1...Sc3
- 2.Rc5#
- 1...Sc5
- 2.Rxc5#
- 2.Qxc5#
- 1...Qxc7!
- threat
- 1.Qxh7?
- threat
- 2.Rd7#
- 2.Qe4#
- 2.Qd7#
- 1...Bxe6
- 2.Qe4#
- 1...Bxh7
- 2.Rd7#
- 1...Sxb5
- 2.Bc4#
- 2.Qe4#
- 1...Bf7
- 2.Rd7#
- 2.Qe4#
- 1...Sc4
- 2.Bxc4#
- 2.Qe4#
- 1...Sc3
- 2.Rc5#
- 2.Rd7#
- 2.Qd7#
- 1...Sc5
- 2.Rxc5#
- 1...Sb6
- 2.Rc5#
- 2.Qe4#
- 1...Rxh7!
- threat
- 1.f7?
- threat
- 2.Rd7#
- 2.Rd8#
- 1...Qxh6
- 2.Rd7#
- 1...Bxf7
- 2.Rd7#
- 1...Sxb5
- 2.Bc4#
- 1...Qd3
- 2.Rd8#
- 1...Qg6
- 2.Rd7#
- 1...Sc4
- 2.Bxc4#
- 1...Sc5
- 2.Rxc5#
- 1...Sb6
- 2.Rc5#
- 1...Qxf7!
- threat
- 1.Bg2+?
- Keys
- 1.Qxh3!
- 1...Qxh3
- 2.Rd7#
- 1...Qxc7
- 2.Qg2#
- 1...Bxe6
- 2.Qxe6#
- 1...Sxb5
- 2.Bc4#
- 1...Qb1
- 2.Rd7#
- 2.Rd8#
- 1...Qc2
- 2.Rd7#
- 2.Rd8#
- 1...Qd3
- 2.Rd8#
- 1...Qe4
- 2.Rd7#
- 2.Rd8#
- 1...Qf5
- 2.Rd7#
- 1...Qg6
- 2.Rd7#
- 2.Rd8#
- 1...Qh4
- 2.Rd7#
- 2.Rd8#
- 1...Qh5
- 2.Rd7#
- 2.Rd8#
- 1...Qh6
- 2.Bg2#
- 2.Rd7#
- 2.Rd8#
- 2.Qg2#
- 1...Qd7
- 2.Bg2#
- 2.Rxd7#
- 2.Qg2#
- 1...Qe7
- 2.Bg2#
- 1...Qf7
- 2.Bg2#
- 2.Qg2#
- 1...Qg7
- 2.Bg2#
- 2.Qg2#
- 1...Bf7
- 2.Rd7#
- 1...Sb1
- 2.Bc4#
- 1...Sc2
- 2.Bc4#
- 1...Sc4
- 2.Bxc4#
- 1...Sb2
- 2.Rc5#
- 1...Sc3
- 2.Rc5#
- 1...Sc5
- 2.Rxc5#
- 1...Sb6
- 2.Rc5#
- 1...Qxh3
- 1.Qxh3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 6
- Sets
- Q(e);N_GUARD,P_PINB(A)::R(K)
- Q(e);N_GUARD::R(K)
- Q(e);N_GUARD,P_PINS(D)::R(K)
- Q(e);N_GUARD,XQ(J)::R(K)
- Q(e);N_GUARD::R(K),XQ(e)
- B(f);S_CUTQ(e)::R(K)
- S(a);N_GUARD::B(A)
- S(a);N_GUARD::B(A),XS(a)
- S(a);N_GUARD,XP(F)::B(A)
- S(c);N_GUARD::R1(K)
- S(c);N_GUARD::R1(K),XS(c)
- Tries
- Try
- B(A);CHECK
- Vars
- Q(e);N_GUARD,P_SPINQ(e)::B(A),XQ(e)
- Refutation
- P(b);XB(A)
- Try
- R(L);CHECK
- Vars
- K(d);S_FLIGHT,XP(H)::R1(L)
- Refutation
- Q(e);P_SPINQ(e)
- Try
- Q(J);
- Threat
- QAB1(J)
- Vars
- Q(e);N_GUARD::R(K)
- Q(e);N_GUARD::R(K),XQ(e)
- S(a);N_GUARD::B(A)
- S(c);N_GUARD::R1(K)
- Refutation
- Q(e);XR(K)
- Try
- Q(J);XQ(e)
- Threat
- DUALS(3)
- Vars
- B(f);XP(H)::QAB1(J)
- B(f);XQ(J)::R(K)
- S(c);N_GUARD::R1(K),XS(c)
- Refutation
- R(g);XQ(J)
- Try
- P(I);
- Threat
- DUALS(2)
- Vars
- Q(e);XQ(J)::R(K)
- B(f);XP(I)::R(K)
- S(a);N_GUARD,XP(F)::B(A)
- Q(e);::R(L)
- Q(e);P_PINS(D)::R(K)
- S(a);N_GUARD::B(A),XS(a)
- S(c);N_GUARD::R1(K),XS(c)
- S(c);N_GUARD::R1(K)
- Refutation
- Q(e);XP(I)
- Try
- Actual
- Q(J);XP(b)
- Vars
- Q(e);N_GUARD,XQ(J)::R(K)
- Q(e);N_GUARD,XR(K)::QAB(J)
- B(f);OGATE,XP(H)::QAB1(J),XB(f)
- S(a);N_GUARD,XP(F)::B(A)
- Q(e);N_GUARD::R(L)
- Q(e);N_GUARD::R(K)
- Q(e);N_GUARD::B(A)
- B(f);S_CUTQ(e)::R(K)
- S(a);N_GUARD::B(A)
- S(a);N_GUARD::B(A),XS(a)
- S(c);N_GUARD::R1(K)
- S(c);N_GUARD::R1(K),XS(c)
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).