MESON Chess Problem Database
Problem Display
PID: 250192 (1B2R3/1B2Npb1/1K2Nq1p/3P1p2/R2pk3/2P1p3/4P3/8 w - - 0 1)
Nietvelt, Gustaaf Josephus
Shakhmaty, 1927
#2
10 + 8
| 6490 | yacpdb | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qh4
- 2.Sc5#
- 1...Qg5
- 2.Sc5#
- 1...Qxe7
- 2.Sc5#
- 1...Qxe6+
- 2.dxe6#
- 1...fxe6
- 2.dxe6#
- 1...Qh4
- Tries
- 1.Ka5?
- threat
- 2.Sc5#
- 1...Qxe6
- 2.dxe6#
- 1...fxe6
- 2.dxe6#
- 1...Qe5!
- threat
- 1.Kb5?
- threat
- 2.Sc5#
- 1...Qxe6
- 2.dxe6#
- 1...fxe6
- 2.dxe6#
- 1...Qe5!
- threat
- 1.Ka7?
- threat
- 2.Sc5#
- 1...Qxe6
- 2.dxe6#
- 1...fxe6
- 2.dxe6#
- 1...Qe5!
- threat
- 1.Bc6?
- threat
- 2.Sc5#
- 1...Qxe6
- 2.dxe6#
- 1...fxe6
- 2.dxe6#
- 1...Qe5!
- threat
- 1.Bh2?
- threat
- 2.d6#
- 1...Qxe6+
- 2.dxe6#
- 1...Qxe7
- 2.Sc5#
- 1...Qe5
- 2.Sc5#
- 1...f4!
- threat
- 1.Bg3?
- threat
- 2.d6#
- 1...Qxe6+
- 2.dxe6#
- 1...Qxe7
- 2.Sc5#
- 1...Qe5
- 2.Sc5#
- 1...f4!
- threat
- 1.Bd6?
- threat
- 2.Sc5#
- 1...Qxe6
- 2.dxe6#
- 1...fxe6
- 2.dxe6#
- 1...Qe5!
- threat
- 1.Ra5?
- threat
- 2.d6#
- 1...Qxe6+
- 2.dxe6#
- 1...Qxe7
- 2.Sc5#
- 1...fxe6
- 2.dxe6#
- 1...Qe5!
- threat
- 1.Ka5?
- Keys
- 1.cxd4!
- threat
- 2.d6#
- 1...Qxd4+
- 2.Sc5#
- 1...Qxe6+
- 2.dxe6#
- 1...Qxe7
- 2.Sc5#
- 1...fxe6
- 2.dxe6#
- 1...Qe5
- 2.dxe5#
- threat
- 1.cxd4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- Q(e);N_PINS(F)::S(F)
- Q(e);N_PINS(F),XS(H)::S(F)
- Q(e);CHECK,OGATE,XS(F)::B(G)+P(D),XQ(e)
- P(g);OGATE,XS(F)::B(G)+P(D),XP(g)
- Tries
- Try
- K(E);N_SPINS(F),S_FLIGHT
- Threat
- S(F)
- Vars
- Q(e);OGATE,XS(F)::B(G)+P(D),XQ(e)
- P(g);OGATE,XS(F)::B(G)+P(D),XP(g)
- Refutation
- Q(e);P_PINP(D)
- Try
- K(E);N_SPINS(F),P-FLIGHT
- Threat
- S(F)
- Vars
- Q(e);OGATE,XS(F)::B(G)+P(D),XQ(e)
- P(g);OGATE,XS(F)::B(G)+P(D),XP(g)
- Refutation
- Q(e);P_PINP(D)
- Try
- K(E);N_SPINS(F),S_FLIGHT
- Threat
- S(F)
- Vars
- Q(e);OGATE,XS(F)::B(G)+P(D),XQ(e)
- P(g);OGATE,XS(F)::B(G)+P(D),XP(g)
- Refutation
- Q(e);
- Try
- B(G);N_SPINS(F)
- Threat
- S(F)
- Vars
- Q(e);OGATE,P_PINB(G),XS(F)::B(G)+P(D),XQ(e)
- P(g);OGATE,XS(F)::B(G)+P(D),XP(g)
- Refutation
- Q(e);
- Try
- B(I);
- Threat
- B(G)+P(D)
- Vars
- Q(e);CHECK,OGATE,XS(F)::B(G)+P(D),XQ(e)
- Q(e);N_PINS(F),XS(H)::S(F)
- Q(e);N_PINS(F)::S(F)
- Refutation
- P(d);
- Try
- B(I);
- Threat
- B(G)+P(D)
- Vars
- Q(e);CHECK,OGATE,XS(F)::B(G)+P(D),XQ(e)
- Q(e);N_PINS(F),XS(H)::S(F)
- Q(e);N_PINS(F)::S(F)
- Refutation
- P(d);
- Try
- B(I);N_SPINS(F)
- Threat
- S(F)
- Vars
- Q(e);OGATE,P_PINB(I),XS(F)::B(G)+P(D),XQ(e)
- P(g);OGATE,XS(F)::B(G)+P(D),XP(g)
- Refutation
- Q(e);
- Try
- R(C);N_PINP(b)
- Threat
- B(G)+P(D)
- Vars
- Q(e);CHECK,OGATE,XS(F)::B(G)+P(D),XQ(e)
- Q(e);N_PINS(F),XS(H)::S(F)
- P(g);OGATE,XS(F)::B(G)+P(D),XP(g)
- Refutation
- Q(e);N_PINS(F)
- Try
- Actual
- P(B);XP(b)
- Threat
- B(G)+P(D)
- Vars
- Q(e);CHECK,N_PINS(F),P_SPINQ(e),XP(B)::S(F)
- Q(e);CHECK,OGATE,XS(F)::B(G)+P(D),XQ(e)
- Q(e);N_PINS(F),XS(H)::S(F)
- P(g);OGATE,XS(F)::B(G)+P(D),XP(g)
- Q(e);N_PINS(F),OGATE::R(C)+P(B),XQ(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).