MESON Chess Problem Database
Problem Display
PID: 276596 (q1B1n1r1/1pnR3N/2P1kp1N/8/1B4p1/5pQ1/5K2/8 w - - 0 1)
Hartong, Jan
Niemeijer, Meindert
To Mat, 1956
#2
8 + 9
| 15601 | Albrecht-Leiss-Degener Collection | 2024 |
SOLUTION
- SOUND
- Sets
- 1...Qa1
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd8#
- 1...Qa2+
- 2.Rd2#
- 1...Qa3
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd8#
- 1...Qa4
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd8#
- 1...Qa5
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd8#
- 1...Qa6
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd8#
- 1...Qa7+
- 2.Rd4#
- 1...Rg5
- 2.Sf8#
- 1...Rg6
- 2.Sf8#
- 1...Rg7
- 2.Sf8#
- 1...Rf8
- 2.Sxf8#
- 1...Sd5
- 2.Re7#
- 1...Sd6
- 2.Qxd6#
- 1...Sg7
- 2.Qd6#
- 1...Qa1
- Tries
- 1.Kg1?
- threat
- 2.Qe1#
- 1...Qa1+
- 2.Rd1#
- 1...Qa7+
- 2.Rd4#
- 1...Sd6
- 2.Qxd6#
- 1...Qa2
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd8#
- 1...Qa3
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd8#
- 1...Qa5
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd8#
- 1...Qa6
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd8#
- 1...Rg5
- 2.Sf8#
- 1...Sd5
- 2.Re7#
- 1...f2+!
- threat
- 1.Bf8?
- threat
- 2.Rd6#
- 1...Qa2+
- 2.Rd2#
- 1...Qa7+
- 2.Rd4#
- 1...Rxf8
- 2.Sxf8#
- 1...Sd6
- 2.Rxd6#
- 2.Qxd6#
- 1...Qxc8!
- threat
- 1.Qf4?
- threat
- 2.Qe3#
- 2.Qe4#
- 2.Qf5#
- 1...Qa2+
- 2.Rd2#
- 1...Qa7+
- 2.Rd4#
- 1...Sd6
- 2.Qxd6#
- 1...Qa1
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd8#
- 2.Qf5#
- 1...Qa3
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd8#
- 2.Qe4#
- 2.Qf5#
- 1...Qa5
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd8#
- 1...Rg5
- 2.Sf8#
- 1...Sd5
- 2.Re7#
- 2.Qe4#
- 2.Qf5#
- 1...Sg7
- 2.Qe3#
- 2.Qd6#
- 2.Qe4#
- 2.Qxf6#
- 1...f5
- 2.Qe3#
- 2.Qxf5#
- 1...g3+!
- threat
- 1.Qxg4+?
- 1...Ke5
- 2.Sf7#
- 2.Bc3#
- 2.Qf5#
- 1...f5
- 2.Qxf5#
- 1...Rxg4!
- 1...Ke5
- 1.Kg1?
- Keys
- 1.Kf1!
- threat
- 2.Qe1#
- 1...Qa1+
- 2.Rd1#
- 1...Qa6+
- 2.Rd3#
- 1...Sd6
- 2.Qxd6#
- 1...Qa2
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd8#
- 1...Qa3
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd8#
- 1...Qa5
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd8#
- 1...Qa7
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd8#
- 1...Rg5
- 2.Sf8#
- 1...Sd5
- 2.Re7#
- 1...f2
- 2.Qe3#
- threat
- 1.Kf1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 6
- Sets
- Q(g);CHECK,N_GUARD::B(H)+R(F)
- R(i);N_GUARD::S(G)
- R(i);N_GUARD::S(G),XR(i)
- S(f);SBLOCK::B(H)+R(F),DCHECK
- S(h);N_GUARD::QAR1(B),XS(h)
- S(h);N_GUARD::QAR1(B)
- Tries
- Try
- K(A);S_FLIGHT
- Threat
- QAR(B)
- Vars
- Q(g);CHECK,N_GUARD::B(H)+R(F)
- S(h);N_GUARD::QAR1(B),XS(h)
- R(i);N_GUARD::S(G)
- S(f);SBLOCK::B(H)+R(F),DCHECK
- Refutation
- P(a);CHECK
- Try
- B(C);
- Threat
- B(H)+R(F),DCHECK
- Vars
- Q(g);CHECK,N_GUARD::B(H)+R(F)
- R(i);XB(C)::S(G),XR(i)
- Refutation
- Q(g);XB(H)
- Try
- Q(B);
- Threat
- DUALS(3)
- Vars
- Q(g);CHECK,N_GUARD::B(H)+R(F)
- S(h);N_GUARD::QAR1(B),XS(h)
- R(i);N_GUARD::S(G)
- Refutation
- P(b);CHECK
- Try
- Q(B);CHECK,XP(b)
- Vars
- P(d);P_SPINP(d)::QAB1(B),XP(d)
- Refutation
- R(i);XQ(B)
- Try
- Actual
- K(A);P-FLIGHT
- Threat
- QAR(B)
- Vars
- Q(g);CHECK,N_GUARD::B(H)+R(F)
- S(h);N_GUARD::QAR1(B),XS(h)
- R(i);N_GUARD::S(G)
- S(f);SBLOCK::B(H)+R(F),DCHECK
- P(a);OGATE::QAR(B)
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).