MESON Chess Problem Database
Problem Display
PID: 202477 (8/nQ3p2/K3pP2/4B3/NbkN1p2/1p3P2/1p6/1B6 w - - 0 1)
Nanning, Willem
De Maasbode, 1923
#2
8 + 8
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Be1
- 2.Qxb3#
- 1...Bd2
- 2.Qxb3#
- 1...Ba3
- 2.Qxb3#
- 1...Bc3
- 2.Qxb3#
- 1...Ba5
- 2.Qxb3#
- 1...Bc5
- 2.Qxb3#
- 1...Bd6
- 2.Qxb3#
- 1...Be7
- 2.Qxb3#
- 1...Bf8
- 2.Qxb3#
- 1...Sb5
- 2.Qxb5#
- 1...Sc6
- 2.Qb5#
- 1...Sc8
- 2.Qb5#
- 1...Be1
- Tries
- 1.Sxb2+?
- 1...Kc5
- 2.Sxb3#
- 1...Kc3!
- 1...Kc5
- 1.Sb6+?
- 1...Kc5
- 2.Sxb3#
- 2.Qe7#
- 1...Kc3!
- 1...Kc5
- 1.Se2?
- threat
- 2.Qe4#
- 1...Sc6
- 2.Qb5#
- 1...Bc5
- 2.Sxb2#
- 1...Sb5
- 2.Qxb5#
- 1...Bc3!
- threat
- 1.Sxe6?
- threat
- 2.Sxb2#
- 2.Sb6#
- 2.Qe4#
- 1...fxe6
- 2.Qe4#
- 1...Sc6
- 2.Sb6#
- 2.Qb5#
- 1...Be1
- 2.Sxb2#
- 2.Qe4#
- 1...Bd2
- 2.Sxb2#
- 2.Qe4#
- 1...Ba3
- 2.Qe4#
- 1...Ba5
- 2.Sxb2#
- 2.Qe4#
- 1...Bc5
- 2.Sxb2#
- 1...Bd6
- 2.Sxb2#
- 2.Qe4#
- 1...Be7
- 2.Sxb2#
- 2.Qe4#
- 1...Bf8
- 2.Sxb2#
- 2.Qe4#
- 1...Sb5
- 2.Sxb2#
- 2.Sb6#
- 2.Qxb5#
- 1...Sc8
- 2.Sxb2#
- 2.Qe4#
- 2.Qb5#
- 1...Bc3!
- threat
- 1.Qc6+?
- 1...Bc5
- 2.Qxc5#
- 1...Sxc6!
- 1...Bc5
- 1.Qxb4+?
- 1...Kd5
- 2.Qc5#
- 1...Kxb4!
- 1...Kd5
- 1.Qb6?
- 1...Be1
- 2.Qc5#
- 2.Qxb3#
- 1...Bd2
- 2.Qc5#
- 2.Qxb3#
- 1...Ba3
- 2.Qxb3#
- 1...Bc3
- 2.Qc5#
- 2.Qxb3#
- 1...Ba5
- 2.Qc5#
- 2.Qxb3#
- 1...Bc5
- 2.Qxc5#
- 2.Qxb3#
- 1...Bd6
- 2.Qxb3#
- 1...Be7
- 2.Qxb3#
- 1...Bf8
- 2.Qxb3#
- 1...Sb5
- 2.Qxb5#
- 1...Sc6
- 2.Qb5#
- 1...Sc8
- 2.Qb5#
- 1...Kd5!
- 1...Be1
- 1.Qc7+?
- 1...Kd5
- 2.Sb6#
- 2.Be4#
- 1...Bc5
- 2.Qxc5#
- 1...Sc6!
- 1...Kd5
- 1.Qb8?
- 1...Be1
- 2.Qxb3#
- 1...Bd2
- 2.Qxb3#
- 1...Ba3
- 2.Qxb3#
- 1...Bc3
- 2.Qxb3#
- 1...Ba5
- 2.Qxb3#
- 1...Bc5
- 2.Qxb3#
- 1...Bd6
- 2.Qxb3#
- 1...Be7
- 2.Qxb3#
- 1...Bf8
- 2.Qxb3#
- 1...Sb5
- 2.Qxb5#
- 1...Sc6
- 2.Qb5#
- 1...Sc8
- 2.Qb5#
- 1...Kd5!
- 1...Be1
- 1.Sxb2+?
- Keys
- 1.Sf5!
- threat
- 2.Qe4#
- 1...exf5
- 2.Qxf7#
- 1...Sc6
- 2.Qb5#
- 1...Bc3
- 2.Sd6#
- 1...Bc5
- 2.Sxb2#
- 1...Sb5
- 2.Qxb5#
- threat
- 1.Sf5!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 8
- Sets
- B(c);OGATE::QAB1(H),XP(b)
- S(g);N_GUARD::QAB1(H),XS(g)
- S(g);N_GUARD::QAB1(H)
- Tries
- Try
- S(C);CHECK,XP(a)
- Vars
- K(d);P-FLIGHT::S(D),XP(b)
- Refutation
- K(d);P-FLIGHT
- Try
- S(C);CHECK
- Refutation
- K(d);P-FLIGHT
- Try
- S(D);
- Threat
- QAR2(H)
- Vars
- S(g);N_GUARD::QAB1(H)
- B(c);SBLOCK::S(C),XP(a)
- S(g);N_GUARD::QAB1(H),XS(g)
- Refutation
- B(c);
- Try
- S(D);XP(f)
- Threat
- DUALS(3)
- Vars
- P(h);XS(D)::QAR2(H)
- B(c);::QAR2(H)
- B(c);::S(C),XP(a)
- Refutation
- B(c);
- Try
- Q(H);CHECK
- Vars
- B(c);N_GUARD,P_SPINB(c)::QAR1(H),XB(c)
- Refutation
- S(g);XQ(H)
- Try
- Q(H);CHECK,XB(c)
- Vars
- K(d);S_FLIGHT::QAR1(H)
- Refutation
- K(d);P-FLIGHT,XQ(H)
- Try
- Q(H);
- Vars
- B(c);OGATE::QAB1(H),XP(b)
- S(g);N_GUARD::QAB1(H),XS(g)
- S(g);N_GUARD::QAB1(H)
- Refutation
- K(d);S_FLIGHT
- Try
- Q(H);CHECK
- Vars
- B(c);N_GUARD,P_SPINB(c)::QAR1(H),XB(c)
- Refutation
- S(g);P_SPINS(g)
- Try
- Q(H);
- Vars
- B(c);OGATE::QAB1(H),XP(b)
- S(g);N_GUARD::QAB1(H),XS(g)
- S(g);N_GUARD::QAB1(H)
- Refutation
- K(d);S_FLIGHT
- Try
- Actual
- S(D);
- Threat
- QAR2(H)
- Vars
- P(f);OGATEB,XS(D)::QAB(H),XP(h)
- S(g);N_GUARD::QAB1(H)
- B(c);N_GUARD::S(D)
- B(c);SBLOCK::S(C),XP(a)
- S(g);N_GUARD::QAB1(H),XS(g)
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).