MESON Chess Problem Database
Problem Display
PID: 230824 (1R5K/8/7B/5B2/3p4/1Pk5/7Q/b1rr1N2 w - - 0 1)
Hoffmann, Fritz
Stella Polaris, 1968
#2
7 + 5
SOLUTION
- SOUND
- Sets
- 1...Rb1
- 2.Qc2#
- 1...Rc2
- 2.Qxc2#
- 1...Re1
- 2.Qd2#
- 1...Rxf1
- 2.Qd2#
- 1...Rd2
- 2.Qxd2#
- 1...Bb2
- 2.Qc7#
- 1...d3
- 2.Bg7#
- 1...Rb1
- Tries
- 1.Kh7?
- 1...Rxf1
- 2.Qd2#
- 1...Rc2
- 2.Qxc2#
- 1...Rd2
- 2.Qxd2#
- 1...d3
- 2.Bg7#
- 1...Rb1
- 2.Qc2#
- 1...Re1
- 2.Qd2#
- 1...Bb2
- 2.Qc7#
- 1...Rd3!
- 1...Rxf1
- 1.Kg8?
- 1...Rxf1
- 2.Qd2#
- 1...Rc2
- 2.Qxc2#
- 1...Rd2
- 2.Qxd2#
- 1...d3
- 2.Bg7#
- 1...Rb1
- 2.Qc2#
- 1...Re1
- 2.Qd2#
- 1...Bb2
- 2.Qc7#
- 1...Rd3!
- 1...Rxf1
- 1.Be4?
- 1...Rxf1
- 2.Qd2#
- 1...Rc2
- 2.Qxc2#
- 1...Rd2
- 2.Qxd2#
- 1...d3
- 2.Bg7#
- 1...Rb1
- 2.Qc2#
- 1...Re1
- 2.Qd2#
- 1...Bb2
- 2.Qc7#
- 1...Rd3!
- 1...Rxf1
- 1.Bg6?
- 1...Rxf1
- 2.Qd2#
- 1...Rc2
- 2.Qxc2#
- 1...Rd2
- 2.Qxd2#
- 1...d3
- 2.Bg7#
- 1...Rb1
- 2.Qc2#
- 1...Re1
- 2.Qd2#
- 1...Bb2
- 2.Qc7#
- 1...Rd3!
- 1...Rxf1
- 1.Bh7?
- 1...Rxf1
- 2.Qd2#
- 1...Rc2
- 2.Qxc2#
- 1...Rd2
- 2.Qxd2#
- 1...d3
- 2.Bg7#
- 1...Rb1
- 2.Qc2#
- 1...Re1
- 2.Qd2#
- 1...Bb2
- 2.Qc7#
- 1...Rd3!
- 1...Rxf1
- 1.Bxc1?
- threat
- 2.Qc7#
- 2.Qc2#
- 1...Rxc1
- 2.Qd2#
- 1...Rd3
- 2.Qc7#
- 1...Rd2
- 2.Qc7#
- 2.Qxd2#
- 1...d3!
- threat
- 1.Bd2+?
- 1...Rxd2
- 2.Qxd2#
- 1...Kb2!
- 1...Rxd2
- 1.Bg5?
- 1...Rxf1
- 2.Qd2#
- 1...Rc2
- 2.Qxc2#
- 1...Rd2
- 2.Qxd2#
- 1...d3
- 2.Bf6#
- 1...Rb1
- 2.Qc2#
- 1...Re1
- 2.Qd2#
- 1...Bb2
- 2.Qc7#
- 1...Rd3!
- 1...Rxf1
- 1.Rb5?
- 1...Rxf1
- 2.Qd2#
- 1...Rc2
- 2.Qxc2#
- 1...Rd2
- 2.Qxd2#
- 1...d3
- 2.Bg7#
- 1...Rb1
- 2.Qc2#
- 1...Re1
- 2.Qd2#
- 1...Bb2
- 2.Qc7#
- 1...Rd3!
- 1...Rxf1
- 1.Rb6?
- 1...Rxf1
- 2.Qd2#
- 1...Rc2
- 2.Qxc2#
- 1...Rd2
- 2.Qxd2#
- 1...d3
- 2.Bg7#
- 1...Rb1
- 2.Qc2#
- 1...Re1
- 2.Qd2#
- 1...Bb2
- 2.Qc7#
- 1...Rd3!
- 1...Rxf1
- 1.Rb7?
- 1...Rxf1
- 2.Qd2#
- 1...Rc2
- 2.Qxc2#
- 1...Rd2
- 2.Qxd2#
- 1...d3
- 2.Bg7#
- 1...Rb1
- 2.Qc2#
- 1...Re1
- 2.Qd2#
- 1...Bb2
- 2.Qc7#
- 1...Rd3!
- 1...Rxf1
- 1.Qa2?
- 1...Rxf1
- 2.Bd2#
- 2.Qd2#
- 1...d3
- 2.Bg7#
- 1...Rb1
- 2.Qc2#
- 1...Rc2
- 2.Qxc2#
- 1...Re1
- 2.Bd2#
- 2.Qd2#
- 1...Rd2
- 2.Bxd2#
- 2.Qxd2#
- 1...Bb2
- 2.Qa5#
- 1...Rd3!
- 1...Rxf1
- 1.Qe2?
- 1...Rxf1
- 2.Qd2#
- 1...Rc2
- 2.Qxc2#
- 1...Rd2
- 2.Qxd2#
- 1...d3
- 2.Bg7#
- 1...Rb1
- 2.Qc2#
- 1...Re1
- 2.Qd2#
- 1...Bb2
- 2.Qc4#
- 1...Rd3!
- 1...Rxf1
- 1.Qg2?
- 1...Rxf1
- 2.Qd2#
- 1...Rc2
- 2.Qxc2#
- 1...Rd2
- 2.Qxd2#
- 1...d3
- 2.Bg7#
- 1...Rb1
- 2.Qc2#
- 1...Re1
- 2.Qd2#
- 1...Bb2
- 2.Qc6#
- 1...Rd3!
- 1...Rxf1
- 1.Kh7?
- Keys
- 1.Sg3!
- 1...Rc2
- 2.Qxc2#
- 1...Rd2
- 2.Qxd2#
- 1...d3
- 2.Bg7#
- 1...Rd3
- 2.Se4#
- 1...Rb1
- 2.Qc2#
- 1...Re1
- 2.Qd2#
- 1...Rf1
- 2.Qd2#
- 1...Rg1
- 2.Qd2#
- 1...Rh1
- 2.Qd2#
- 1...Bb2
- 2.Se2#
- 1...Rc2
- 1.Sg3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- R(b);N_GUARD::QAR1(B)
- R(b);N_GUARD::QAR1(B),XR(b)
- R(c);N_GUARD::QAB1(B)
- R(c);N_GUARD,XS(A)::QAB1(B)
- R(c);N_GUARD::QAB1(B),XR(c)
- B(a);SBLOCK::QAR(B)
- P(e);OGATEB::B(E)
- Tries
- Try
- K(G);P-FLIGHT
- Vars
- R(c);N_GUARD,XS(A)::QAB1(B)
- R(b);N_GUARD::QAR1(B),XR(b)
- R(c);N_GUARD::QAB1(B),XR(c)
- P(e);OGATEB::B(E)
- R(b);N_GUARD::QAR1(B)
- R(c);N_GUARD::QAB1(B)
- B(a);SBLOCK::QAR(B)
- Refutation
- R(c);
- Try
- K(G);P-FLIGHT
- Vars
- R(c);N_GUARD,XS(A)::QAB1(B)
- R(b);N_GUARD::QAR1(B),XR(b)
- R(c);N_GUARD::QAB1(B),XR(c)
- P(e);OGATEB::B(E)
- R(b);N_GUARD::QAR1(B)
- R(c);N_GUARD::QAB1(B)
- B(a);SBLOCK::QAR(B)
- Refutation
- R(c);
- Try
- B(D);
- Vars
- R(c);N_GUARD,XS(A)::QAB1(B)
- R(b);N_GUARD::QAR1(B),XR(b)
- R(c);N_GUARD::QAB1(B),XR(c)
- P(e);OGATEB::B(E)
- R(b);N_GUARD::QAR1(B)
- R(c);N_GUARD::QAB1(B)
- B(a);SBLOCK::QAR(B)
- Refutation
- R(c);
- Try
- B(D);
- Vars
- R(c);N_GUARD,XS(A)::QAB1(B)
- R(b);N_GUARD::QAR1(B),XR(b)
- R(c);N_GUARD::QAB1(B),XR(c)
- P(e);OGATEB::B(E)
- R(b);N_GUARD::QAR1(B)
- R(c);N_GUARD::QAB1(B)
- B(a);SBLOCK::QAR(B)
- Refutation
- R(c);
- Try
- B(D);
- Vars
- R(c);N_GUARD,XS(A)::QAB1(B)
- R(b);N_GUARD::QAR1(B),XR(b)
- R(c);N_GUARD::QAB1(B),XR(c)
- P(e);OGATEB::B(E)
- R(b);N_GUARD::QAR1(B)
- R(c);N_GUARD::QAB1(B)
- B(a);SBLOCK::QAR(B)
- Refutation
- R(c);
- Try
- B(E);XR(b)
- Threat
- DUALS(2)
- Vars
- R(c);N_GUARD,XB(E)::QAB1(B)
- R(c);::QAR(B)
- Refutation
- P(e);
- Try
- B(E);CHECK
- Vars
- R(c);OGATE,XB(E)::QAB1(B),XR(c)
- Refutation
- K(d);S_FLIGHT
- Try
- B(E);
- Vars
- R(c);N_GUARD,XS(A)::QAB1(B)
- R(b);N_GUARD::QAR1(B),XR(b)
- R(c);N_GUARD::QAB1(B),XR(c)
- P(e);OGATEB::B(E)
- R(b);N_GUARD::QAR1(B)
- R(c);N_GUARD::QAB1(B)
- B(a);SBLOCK::QAR(B)
- Refutation
- R(c);
- Try
- R(F);
- Vars
- R(c);N_GUARD,XS(A)::QAB1(B)
- R(b);N_GUARD::QAR1(B),XR(b)
- R(c);N_GUARD::QAB1(B),XR(c)
- P(e);OGATEB::B(E)
- R(b);N_GUARD::QAR1(B)
- R(c);N_GUARD::QAB1(B)
- B(a);SBLOCK::QAR(B)
- Refutation
- R(c);
- Try
- R(F);
- Vars
- R(c);N_GUARD,XS(A)::QAB1(B)
- R(b);N_GUARD::QAR1(B),XR(b)
- R(c);N_GUARD::QAB1(B),XR(c)
- P(e);OGATEB::B(E)
- R(b);N_GUARD::QAR1(B)
- R(c);N_GUARD::QAB1(B)
- B(a);SBLOCK::QAR(B)
- Refutation
- R(c);
- Try
- R(F);
- Vars
- R(c);N_GUARD,XS(A)::QAB1(B)
- R(b);N_GUARD::QAR1(B),XR(b)
- R(c);N_GUARD::QAB1(B),XR(c)
- P(e);OGATEB::B(E)
- R(b);N_GUARD::QAR1(B)
- R(c);N_GUARD::QAB1(B)
- B(a);SBLOCK::QAR(B)
- Refutation
- R(c);
- Try
- Q(B);
- Vars
- P(e);OGATEB::B(E)
- R(b);N_GUARD::QAR1(B)
- R(b);N_GUARD::QAR1(B),XR(b)
- B(a);SBLOCK::QAB(B)
- Refutation
- R(c);
- Try
- Q(B);
- Vars
- R(c);N_GUARD,XS(A)::QAB1(B)
- R(b);N_GUARD::QAR1(B),XR(b)
- R(c);N_GUARD::QAB1(B),XR(c)
- P(e);OGATEB::B(E)
- R(b);N_GUARD::QAR1(B)
- R(c);N_GUARD::QAB1(B)
- B(a);SBLOCK::QAR1(B)
- Refutation
- R(c);
- Try
- Q(B);
- Vars
- R(c);N_GUARD,XS(A)::QAB1(B)
- R(b);N_GUARD::QAR1(B),XR(b)
- R(c);N_GUARD::QAB1(B),XR(c)
- P(e);OGATEB::B(E)
- R(b);N_GUARD::QAR1(B)
- R(c);N_GUARD::QAB1(B)
- B(a);SBLOCK::QAR(B)
- Refutation
- R(c);
- Try
- Actual
- S(A);
- Vars
- R(b);N_GUARD::QAR1(B),XR(b)
- R(c);N_GUARD::QAB1(B),XR(c)
- P(e);OGATEB::B(E)
- R(c);SBLOCK::S(A)
- R(b);N_GUARD::QAR1(B)
- R(c);N_GUARD::QAB1(B)
- B(a);SBLOCK::S(A)
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).