MESON Chess Problem Database
Problem Display
PID: 157817 (7K/6Np/2R3pr/pP1k1Bp1/8/1N1p2B1/1p1Q1n2/2q3b1 w - - 0 1)
Petite, Efren
Best Problems, 2008
#2
8 + 11
SOLUTION
- SOUND
- Sets
- 1...Qxd2
- 2.Rc5#
- 1...Qa1
- 2.Rc5#
- 1...Qb1
- 2.Rc5#
- 1...Qd1
- 2.Rc5#
- 1...Qe1
- 2.Rc5#
- 1...Qf1
- 2.Rc5#
- 1...Qc4
- 2.Rd6#
- 1...Qc5
- 2.Rxc5#
- 1...Sd1
- 2.Qg2#
- 1...Sh1
- 2.Qg2#
- 1...Sh3
- 2.Qg2#
- 1...Se4
- 2.Be6#
- 1...Sg4
- 2.Qg2#
- 1...Qxd2
- Tries
- 1.Qc3?
- threat
- 2.Rc5#
- 2.Rd6#
- 2.Qd4#
- 2.Qe5#
- 1...gxf5
- 2.Qd4#
- 2.Qe5#
- 1...Qe3
- 2.Rd6#
- 2.Qc4#
- 1...Qf4
- 2.Qc5#
- 1...Qe1
- 2.Rc5#
- 2.Rd6#
- 2.Qd4#
- 2.Qc4#
- 2.Qc5#
- 1...Rh4
- 2.Rc5#
- 2.Rd6#
- 2.Qe5#
- 1...Sd1
- 2.Rd6#
- 2.Qe5#
- 1...Sh1
- 2.Rd6#
- 2.Qe5#
- 1...Sh3
- 2.Rd6#
- 2.Qe5#
- 1...Se4
- 2.Be6#
- 2.Qe5#
- 1...Sg4
- 2.Rd6#
- 1...Qxc3!
- threat
- 1.Qe3?
- threat
- 2.Be6#
- 2.Qd4#
- 2.Qe5#
- 2.Qe6#
- 1...Qxc6
- 2.Qd4#
- 1...gxf5
- 2.Qd4#
- 2.Qe5#
- 1...Qc5
- 2.Be6#
- 2.Rxc5#
- 2.Qxc5#
- 2.Qe6#
- 1...Qe1
- 2.Be6#
- 2.Rc5#
- 2.Qd4#
- 2.Qc5#
- 1...Qc3
- 2.Be6#
- 2.Qe6#
- 1...Qc4
- 2.Be6#
- 2.Rd6#
- 2.Qe5#
- 2.Qe6#
- 1...Rh4
- 2.Be6#
- 2.Qe5#
- 2.Qe6#
- 1...Sd1
- 2.Be4#
- 2.Be6#
- 2.Qf3#
- 2.Qe4#
- 2.Qe5#
- 2.Qe6#
- 1...Sh1
- 2.Be4#
- 2.Be6#
- 2.Qf3#
- 2.Qe4#
- 2.Qe5#
- 2.Qe6#
- 1...Sh3
- 2.Be4#
- 2.Be6#
- 2.Qf3#
- 2.Qe4#
- 2.Qe5#
- 2.Qe6#
- 1...Se4
- 2.Bxe4#
- 2.Be6#
- 2.Qxe4#
- 1...Sg4
- 2.Be4#
- 2.Be6#
- 2.Qf3#
- 2.Qe4#
- 2.Qe6#
- 1...Qxe3!
- threat
- 1.Qb4?
- threat
- 2.Be6#
- 2.Rd6#
- 2.Qd6#
- 2.Qd4#
- 1...Qxc6
- 2.Qd4#
- 1...gxf5
- 2.Qd4#
- 1...Qf4
- 2.Qc5#
- 1...Qe3
- 2.Rd6#
- 2.Qd6#
- 2.Qc4#
- 1...Qe1
- 2.Rc5#
- 2.Rd6#
- 2.Qc5#
- 2.Qd6#
- 2.Qc4#
- 2.Qd4#
- 1...Qc3
- 2.Be6#
- 2.Rd6#
- 2.Qd6#
- 1...Qc4
- 2.Rd6#
- 2.Qd6#
- 2.Qxc4#
- 1...Qc5
- 2.Be6#
- 2.Rxc5#
- 2.Qxc5#
- 1...Rh4
- 2.Be6#
- 2.Rd6#
- 2.Qd6#
- 1...Sd1
- 2.Be4#
- 2.Be6#
- 2.Rd6#
- 2.Qd6#
- 2.Qe4#
- 1...Sh1
- 2.Be4#
- 2.Be6#
- 2.Rd6#
- 2.Qd6#
- 2.Qe4#
- 1...Sh3
- 2.Be4#
- 2.Be6#
- 2.Rd6#
- 2.Qd6#
- 2.Qe4#
- 1...Se4
- 2.Bxe4#
- 2.Be6#
- 2.Qxe4#
- 1...Sg4
- 2.Be4#
- 2.Be6#
- 2.Rd6#
- 2.Qd6#
- 2.Qe4#
- 1...axb4!
- threat
- 1.Qxg5?
- threat
- 2.Qd8#
- 1...Qxg5
- 2.Rc5#
- 1...Qxc6
- 2.Bxd3#
- 1...gxf5
- 2.Qxf5#
- 1...Qc5
- 2.Bxd3#
- 2.Rxc5#
- 1...Se4
- 2.Be6#
- 1...Qf4!
- threat
- 1.Qc3?
- Keys
- 1.Bxd3!
- threat
- 2.Rd6#
- 1...Qxc6
- 2.Qxg5#
- 1...Sxd3
- 2.Qg2#
- 1...Qc5
- 2.Rxc5#
- 2.Qxg5#
- 1...Se4
- 2.Bc4#
- threat
- 1.Bxd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 12
- Sets
- Q(a);N_GUARD,N_SPINP(e),XQ(A)::R1(F)
- Q(a);N_GUARD::R1(F)
- Q(a);SBLOCK::R1(F)
- Q(a);N_GUARD::R1(F),XQ(a)
- S(d);OGATE::QAB(A)
- S(d);SBLOCK::B(E)
- Tries
- Try
- Q(A);N_PINP(e)
- Threat
- DUALS(4)
- Vars
- Q(a);N_GUARD::QAR1(A)
- S(d);::R1(F)
- Refutation
- Q(a);P_PINS(G),XQ(A)
- Try
- Q(A);N_PINP(e)
- Threat
- DUALS(4)
- Vars
- Q(a);XR(F)::QAR1(A)
- Refutation
- Q(a);XQ(A)
- Try
- Q(A);N_PINP(e)
- Threat
- DUALS(4)
- Vars
- Q(a);XR(F)::QAR1(A)
- P(i);XB(E)::QAR1(A)
- Q(a);N_GUARD::QAR1(A)
- Refutation
- P(f);XQ(A)
- Try
- Q(A);N_PINP(e),XP(h)
- Threat
- QAR(A)
- Vars
- Q(a);N_GUARD,XQ(A)::R1(F)
- Q(a);N_GUARD,XR(F)::QAR(A)+B(E),XP(e)
- P(i);OGATE,P_SPINP(i),XB(E)::QAR2(A),XP(i)
- S(d);SBLOCK::QAR(A)+B(E),DCHECK
- Refutation
- Q(a);
- Try
- Actual
- B(E);XP(e)
- Threat
- R1(F)
- Vars
- Q(a);N_GUARD,XR(F)::QAR(A),XP(h)
- S(d);OGATE,P_SPINS(d),XB(E)::QAB(A)
- S(d);SBLOCK::QAR(A)+B(E),DCHECK
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).