MESON Chess Problem Database
Problem Display
PID: 17550 (2K1k1Bn/p5B1/5P2/2p5/7Q/6n1/r7/8 w - - 0 1)
Sommer, Bruno Oswald
Schach-Express, 1947
#2
5 + 6
SOLUTION
- SOUND
- Sets
- 1...Rc2
- 2.Qa4#
- 1...Re2
- 2.Qa4#
- 1...Rf2
- 2.Qa4#
- 1...Rg2
- 2.Qa4#
- 1...Rh2
- 2.Qa4#
- 1...Ra4
- 2.Qxa4#
- 1...Sf1
- 2.Qe4#
- 1...Sh1
- 2.Qe4#
- 1...Se2
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sh5
- 2.Qe4#
- 1...Sg6
- 2.f7#
- 1...Rc2
- Tries
- 1.Bxa2?
- threat
- 2.Qa4#
- 2.Qxh8#
- 1...Se4
- 2.Qxe4#
- 2.Qxh8#
- 1...Sh5
- 2.Qe1#
- 2.Qa4#
- 2.Qe4#
- 1...Sg6
- 2.Qa4#
- 2.f7#
- 1...Sf7
- 2.Qa4#
- 1...c4!
- threat
- 1.Bc4?
- threat
- 2.Qxh8#
- 1...Sh5
- 2.Qe4#
- 1...Sg6
- 2.f7#
- 1...Sf7
- 2.Bb5#
- 1...Rh2!
- threat
- 1.Be6?
- threat
- 2.Qxh8#
- 1...Rh2
- 2.Qa4#
- 1...Sg6
- 2.f7#
- 1...Sf7
- 2.Bd7#
- 1...Sh5!
- threat
- 1.Qh3?
- threat
- 2.Qe6#
- 2.Qd7#
- 1...Rd2
- 2.Qe6#
- 1...Re2
- 2.Qd7#
- 1...Ra6
- 2.Qd7#
- 1...Sg6
- 2.Qd7#
- 1...Sf5!
- threat
- 1.Qc4?
- threat
- 2.Qb5#
- 2.Qe6#
- 1...Rb2
- 2.Qe6#
- 1...Rd2
- 2.Qe6#
- 1...Re2
- 2.Qb5#
- 2.Qa4#
- 1...Ra5
- 2.Qe6#
- 1...Sf5
- 2.Qb5#
- 1...Sg6
- 2.Bf7#
- 2.Qb5#
- 2.Qf7#
- 1...a6
- 2.Qe6#
- 1...Ra6!
- threat
- 1.Qd4?
- threat
- 2.Qe5#
- 2.Qd7#
- 2.Qd8#
- 1...Rd2
- 2.Qe5#
- 1...Re2
- 2.Qa4#
- 2.Qd7#
- 2.Qd8#
- 1...Ra6
- 2.Qd7#
- 2.Qd8#
- 1...Sf5
- 2.Qd7#
- 2.Qd8#
- 1...Sg6
- 2.Qd7#
- 2.Qd8#
- 1...Sf7
- 2.Qd7#
- 1...cxd4!
- threat
- 1.Qg4?
- threat
- 2.Qe6#
- 2.Qd7#
- 1...Rd2
- 2.Qe6#
- 1...Re2
- 2.Qd7#
- 2.Qa4#
- 1...Ra6
- 2.Qd7#
- 1...Sg6
- 2.Qd7#
- 2.Qxg6#
- 1...Sf5!
- threat
- 1.Qh5+?
- 1...Sg6
- 2.Qxg6#
- 1...Sf7
- 2.Bxf7#
- 2.Qxf7#
- 1...Sxh5!
- 1...Sg6
- 1.Qxh8?
- threat
- 2.Bxa2#
- 2.Bb3#
- 2.Bc4#
- 2.Bd5#
- 2.Be6#
- 1...Ra1
- 2.Ba2#
- 2.Bb3#
- 2.Bc4#
- 2.Bd5#
- 2.Be6#
- 1...Rb2
- 2.Ba2#
- 2.Bb3#
- 2.Bc4#
- 2.Bd5#
- 2.Be6#
- 1...Rc2
- 2.Ba2#
- 2.Bb3#
- 2.Bc4#
- 2.Bd5#
- 2.Be6#
- 1...Rd2
- 2.Ba2#
- 2.Bb3#
- 2.Bc4#
- 2.Bd5#
- 2.Be6#
- 1...Re2
- 2.Ba2#
- 2.Bb3#
- 2.Bc4#
- 2.Bd5#
- 2.Be6#
- 1...Rf2
- 2.Ba2#
- 2.Bb3#
- 2.Bc4#
- 2.Bd5#
- 2.Be6#
- 1...Rg2
- 2.Ba2#
- 2.Bb3#
- 2.Bc4#
- 2.Bd5#
- 2.Be6#
- 1...Ra3
- 2.Ba2#
- 2.Bb3#
- 2.Bc4#
- 2.Bd5#
- 2.Be6#
- 1...Ra4
- 2.Ba2#
- 2.Bb3#
- 2.Bc4#
- 2.Bd5#
- 2.Be6#
- 1...Ra5
- 2.Ba2#
- 2.Bb3#
- 2.Bc4#
- 2.Bd5#
- 2.Be6#
- 1...Ra6
- 2.Ba2#
- 2.Bb3#
- 2.Bc4#
- 2.Bd5#
- 2.Be6#
- 1...c4
- 2.Bxc4#
- 2.Bd5#
- 2.Be6#
- 1...Rh2!
- threat
- 1.Bxa2?
- Keys
- 1.Bd5!
- threat
- 2.Qxh8#
- 1...Rh2
- 2.Qa4#
- 1...Sh5
- 2.Qe4#
- 1...Sg6
- 2.f7#
- 1...Sf7
- 2.Bc6#
- threat
- 1.Bd5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 9
- Sets
- R(a);N_GUARD::QAB(A)
- R(a);N_GUARD::QAB(A),XR(a)
- S(b);N_GUARD::QAR(A)
- S(b);N_GUARD::QAR(A),XS(b)
- S(f);N_GUARD::P(B)
- Tries
- Try
- B(E);XR(a)
- Threat
- DUALS(2)
- Vars
- S(f);::QAB(A)
- Refutation
- P(c);
- Try
- B(E);
- Threat
- QAR(A),XS(f)
- Vars
- S(b);N_GUARD::QAR(A)
- S(f);N_GUARD::P(B)
- S(f);SBLOCK::B(E)
- Refutation
- R(a);
- Try
- B(E);
- Threat
- QAR(A),XS(f)
- Vars
- R(a);N_GUARD::QAB(A)
- S(f);N_GUARD::P(B)
- S(f);SBLOCK::B(E)
- Refutation
- S(b);
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- R(a);::QAR2(A)
- R(a);::QAB1(A)
- S(f);::QAB1(A)
- Refutation
- S(b);
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- R(a);::QAR2(A)
- S(b);::QAB(A)
- P(d);::QAR2(A)
- Refutation
- R(a);
- Try
- Q(A);
- Threat
- DUALS(3)
- Vars
- R(a);::QAR(A)
- S(f);::QAB1(A)
- Refutation
- P(c);XQ(A)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- R(a);::QAR2(A)
- R(a);::QAB1(A)
- Refutation
- S(b);
- Try
- Q(A);CHECK
- Vars
- S(f);N_GUARD,P_SPINS(f)::QAB(A),XS(f)
- Refutation
- S(b);XQ(A)
- Try
- Q(A);XS(f)
- Threat
- DUALS(5)
- Refutation
- R(a);
- Try
- Actual
- B(E);
- Threat
- QAR(A),XS(f)
- Vars
- R(a);N_GUARD::QAB(A)
- S(b);N_GUARD::QAR(A)
- S(f);N_GUARD::P(B)
- S(f);SBLOCK::B(E)
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).