MESON Chess Problem Database
Problem Display
PID: 229097 (2N2n2/n7/1N2R3/K1kB3R/p1pp4/6P1/2p1b1Q1/r6r w - - 0 1)
Hartong, Jan
Der Tijd, 1926
#2
8 + 10
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rab1
- 2.Sxa4#
- 1...Rac1
- 2.Sxa4#
- 1...Rad1
- 2.Sxa4#
- 1...Rae1
- 2.Sxa4#
- 1...Raf1
- 2.Sxa4#
- 1...Rag1
- 2.Sxa4#
- 1...Rhb1
- 2.Bf3#
- 1...Rhc1
- 2.Bf3#
- 1...Rhd1
- 2.Bf3#
- 1...Rhe1
- 2.Bf3#
- 1...Rhf1
- 2.Bf3#
- 1...Rhg1
- 2.Bf3#
- 1...Sb5
- 2.Rc6#
- 1...Sc6+
- 2.Rxc6#
- 1...Sxc8
- 2.Rc6#
- 1...Sxe6
- 2.Sd7#
- 1...Sg6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Sh7
- 2.Sd7#
- 1...a3
- 2.Sa4#
- 1...d3
- 2.Qf2#
- 1...Rab1
- Tries
- 1.Sd6?
- threat
- 2.Se4#
- 2.Sb7#
- 1...d3
- 2.Qf2#
- 1...Rh4
- 2.Sb7#
- 1...Bd3
- 2.Sb7#
- 1...Bf3
- 2.Sb7#
- 1...Sc6+!
- threat
- 1.Sxa7?
- threat
- 2.Rc6#
- 1...d3
- 2.Qf2#
- 1...Sxe6!
- threat
- 1.Bxc4+?
- 1...Bxh5
- 2.Re5#
- 2.Qd5#
- 1...Rxh5!
- 1...Bxh5
- 1.Be4+?
- 1...Bxh5
- 2.Re5#
- 1...Rxh5!
- 1...Bxh5
- 1.Bc6+?
- 1...Bxh5
- 2.Re5#
- 2.Qd5#
- 1...Rxh5!
- 1...Bxh5
- 1.Bb7+?
- 1...Bxh5
- 2.Re5#
- 2.Qd5#
- 1...Rxh5!
- 1...Bxh5
- 1.Ba8+?
- 1...Bxh5
- 2.Re5#
- 2.Qd5#
- 1...Rxh5!
- 1...Bxh5
- 1.Rhe5?
- threat
- 2.Bf3#
- 2.Bxc4#
- 2.Be4#
- 2.Bc6#
- 2.Bb7#
- 2.Ba8#
- 1...Sc6+
- 2.Bxc6#
- 2.Rxc6#
- 1...d3
- 2.Qf2#
- 1...Bf3
- 2.Bxf3#
- 2.Be4#
- 1...Sg6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...c3
- 2.Ba2#
- 2.Bb3#
- 2.Bf3#
- 2.Bc4#
- 2.Be4#
- 2.Bc6#
- 2.Bb7#
- 2.Ba8#
- 1...Rh5!
- threat
- 1.Qf3?
- threat
- 2.Qxf8#
- 1...Sc6+
- 2.Rxc6#
- 1...Sxc8
- 2.Rc6#
- 1...Sxe6
- 2.Sd7#
- 1...d3
- 2.Qf2#
- 2.Qe3#
- 1...Raf1
- 2.Sxa4#
- 2.Qa3#
- 1...Rhf1
- 2.Bxc4#
- 2.Be4#
- 2.Bc6#
- 2.Bb7#
- 2.Ba8#
- 1...Sb5
- 2.Rc6#
- 1...Sg6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Sh7
- 2.Sd7#
- 1...Bxf3!
- threat
- 1.Qxe2?
- threat
- 2.Bxh1#
- 2.Qxc4#
- 1...Sc6+
- 2.Rxc6#
- 1...Rxh5
- 2.Qxc4#
- 1...Sxe6
- 2.Sd7#
- 2.Qxc4#
- 1...d3
- 2.Qf2#
- 2.Qe3#
- 1...c1B
- 2.Qxc4#
- 1...c1R
- 2.Bxh1#
- 1...Raf1
- 2.Sxa4#
- 2.Qxc4#
- 1...Rhb1
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Bxc4#
- 2.Be4#
- 2.Bc6#
- 2.Bb7#
- 2.Ba8#
- 2.Qxc4#
- 1...Rhc1
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Bxc4#
- 2.Be4#
- 2.Bc6#
- 2.Bb7#
- 2.Ba8#
- 2.Qxc4#
- 1...Rhd1
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Bxc4#
- 2.Be4#
- 2.Bc6#
- 2.Bb7#
- 2.Ba8#
- 2.Qxc4#
- 1...Rhe1
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Bxc4#
- 2.Be4#
- 2.Bc6#
- 2.Bb7#
- 2.Ba8#
- 2.Qxc4#
- 1...Rhf1
- 2.Bf3#
- 2.Qxc4#
- 1...Rhg1
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Bxc4#
- 2.Be4#
- 2.Bc6#
- 2.Bb7#
- 2.Ba8#
- 2.Qxc4#
- 1...Rh2
- 2.Qxc4#
- 1...Rh3
- 2.Qxc4#
- 1...Rh4
- 2.Qxc4#
- 1...Sg6
- 2.Sd7#
- 2.Qxc4#
- 1...Sd7
- 2.Sxd7#
- 2.Qxc4#
- 1...Sh7
- 2.Sd7#
- 2.Qxc4#
- 1...c3
- 2.Bxh1#
- 2.Qc4#
- 1...c1Q!
- threat
- 1.Qf2?
- threat
- 2.Qxf8#
- 1...Sc6+
- 2.Rxc6#
- 1...Sxc8
- 2.Rc6#
- 1...Sxe6
- 2.Sd7#
- 1...Raf1
- 2.Sxa4#
- 1...Rhf1
- 2.Bf3#
- 1...Sb5
- 2.Rc6#
- 1...Sg6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Sh7
- 2.Sd7#
- 1...Bf3!
- threat
- 1.Sd6?
- Keys
- 1.Qf1!
- threat
- 2.Qxf8#
- 1...Sc6+
- 2.Rxc6#
- 1...Raxf1
- 2.Sxa4#
- 1...Rhxf1
- 2.Bf3#
- 1...Bxf1
- 2.Bxh1#
- 1...Sxc8
- 2.Rc6#
- 1...Sxe6
- 2.Sd7#
- 1...d3
- 2.Qf2#
- 1...Bf3
- 2.Qxc4#
- 1...Sb5
- 2.Rc6#
- 1...Sg6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Sh7
- 2.Sd7#
- threat
- 1.Qf1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 11
- Sets
- R(a);N_GUARD::S(F),XP(e)
- R(b);N_GUARD::R(E)+B(D)
- S(i);N_GUARD::R1(G)
- S(i);CHECK,N_GUARD::R1(G),XS(i)
- S(i);N_GUARD,XS(H)::R1(G)
- S(j);N_GUARD,XR(G)::S(F)
- S(j);N_GUARD::S(F)
- S(j);N_GUARD::S(F),XS(j)
- P(e);S_CUTR(a)::S(F)
- P(g);OGATEB::QAB(A)
- Tries
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- P(g);OGATEB::QAB(A)
- R(b);::S(H)
- B(d);::S(H)
- Refutation
- S(i);CHECK
- Try
- S(H);XS(i)
- Threat
- R1(G)
- Vars
- P(g);OGATEB::QAB(A)
- Refutation
- S(j);XR(G)
- Try
- B(D);CHECK,XP(f)
- Refutation
- R(b);XR(E)
- Try
- B(D);CHECK
- Vars
- B(d);XR(E)::R(G)
- Refutation
- R(b);XR(E)
- Try
- B(D);CHECK
- Refutation
- R(b);XR(E)
- Try
- B(D);CHECK
- Refutation
- R(b);XR(E)
- Try
- B(D);CHECK
- Refutation
- R(b);XR(E)
- Try
- R(E);
- Threat
- DUALS(6)
- Vars
- P(g);OGATEB::QAB(A)
- S(j);N_GUARD::S(F)
- S(j);N_GUARD::S(F),XS(j)
- Refutation
- R(b);
- Try
- Q(A);
- Threat
- QAB(A),XS(j)
- Vars
- S(i);CHECK,N_GUARD::R1(G),XS(i)
- S(i);N_GUARD,XS(H)::R1(G)
- S(j);N_GUARD,XR(G)::S(F)
- S(i);N_GUARD::R1(G)
- S(j);N_GUARD::S(F)
- S(j);N_GUARD::S(F),XS(j)
- Refutation
- B(d);XQ(A)
- Try
- Q(A);XB(d)
- Threat
- DUALS(2)
- Vars
- S(i);CHECK,N_GUARD::R1(G),XS(i)
- R(b);XR(E)::QAR1(A),XP(f)
- P(c);::QAR1(A),XP(f)
- P(c);::R(E)+B(D),XR(b)
- R(b);::QAR1(A),XP(f)
- Refutation
- P(c);
- Try
- Q(A);P_PINP(g)
- Threat
- QAB(A),XS(j)
- Vars
- S(i);CHECK,N_GUARD::R1(G),XS(i)
- S(i);N_GUARD,XS(H)::R1(G)
- S(j);N_GUARD,XR(G)::S(F)
- R(a);N_GUARD::S(F),XP(e)
- R(b);N_GUARD::R(E)+B(D)
- S(i);N_GUARD::R1(G)
- S(j);N_GUARD::S(F)
- S(j);N_GUARD::S(F),XS(j)
- Refutation
- B(d);
- Try
- Actual
- Q(A);
- Threat
- QAB(A),XS(j)
- Vars
- S(i);CHECK,N_GUARD::R1(G),XS(i)
- R(a);N_GUARD,XQ(A)::S(F),XP(e)
- R(b);N_GUARD,XQ(A)::R(E)+B(D)
- B(d);N_GUARD,XQ(A)::R(E)+B(D),XR(b)
- S(i);N_GUARD,XS(H)::R1(G)
- S(j);N_GUARD,XR(G)::S(F)
- P(g);OGATEB::QAB(A)
- B(d);OGATE::QAR1(A),XP(f)
- S(i);N_GUARD::R1(G)
- S(j);N_GUARD::S(F)
- S(j);N_GUARD::S(F),XS(j)
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).