MESON Chess Problem Database
Problem Display
PID: 138459 (5NK1/5N2/2q1p1Rp/5k2/1Qb4R/3nP3/8/8 w - - 0 1)
Quah, James
The Problemist, 1993
#2
7 + 6
| 14772 | Creative and Imaginative Chess Concepts | 2007 |
SOLUTION
- SOUND
- Sets
- 1...Qa4
- 2.e4#
- 1...Qe4
- 2.Rh5#
- 1...Qb5
- 2.e4#
- 1...Qd7
- 2.e4#
- 1...Qe8
- 2.e4#
- 1...Qc5
- 2.e4#
- 1...Qa6
- 2.e4#
- 1...Qb6
- 2.e4#
- 1...Qd6
- 2.e4#
- 1...Qc7
- 2.e4#
- 1...Qc8
- 2.e4#
- 1...Ba2
- 2.Rh5#
- 2.Qg4#
- 1...Bb3
- 2.Rh5#
- 2.Qg4#
- 1...Bb5
- 2.Rh5#
- 2.Qg4#
- 1...Bd5
- 2.Rh5#
- 2.Qg4#
- 1...Ba6
- 2.Rh5#
- 2.Qg4#
- 1...Sc1
- 2.Rf4#
- 1...Se1
- 2.Rf4#
- 1...Sb2
- 2.Rf4#
- 1...Sf2
- 2.Rf4#
- 1...Sxb4
- 2.Rf4#
- 1...Sf4
- 2.Rxf4#
- 1...Sc5
- 2.Rf4#
- 1...Se5
- 2.Sxh6#
- 2.Rf4#
- 1...Qa4
- Tries
- 1.Kg7?
- threat
- 2.Rf6#
- 1...Sf4
- 2.Rxf4#
- 1...e5
- 2.Sxh6#
- 1...Qg2!
- threat
- 1.Sd6+?
- 1...Ke5
- 2.Rh5#
- 1...Qxd6!
- 1...Ke5
- 1.Rg5+?
- 1...Kf6
- 2.Sh7#
- 2.Rxh6#
- 1...hxg5!
- 1...Kf6
- 1.Qc3?
- threat
- 2.Sxh6#
- 2.Rf6#
- 2.Qf6#
- 1...Sf4
- 2.Rxf4#
- 2.Qe5#
- 1...Qg2
- 2.Sd6#
- 2.Sxh6#
- 2.Qf6#
- 1...Se5
- 2.Sxh6#
- 2.Rf4#
- 2.Qxe5#
- 1...h5
- 2.Sh6#
- 2.Rg5#
- 2.Rf6#
- 2.Qf6#
- 1...e5!
- threat
- 1.Qc5+?
- 1...Qd5
- 2.e4#
- 1...Qxc5
- 2.e4#
- 1...Bd5
- 2.e4#
- 1...Sxc5
- 2.Rf4#
- 1...Se5
- 2.Sxh6#
- 2.Rf4#
- 2.Qxe5#
- 1...e5!
- 1...Qd5
- 1.Qe7?
- threat
- 2.Rf6#
- 2.Qf6#
- 1...Sf4
- 2.Rxf4#
- 1...Qg2
- 2.Qf6#
- 1...e5!
- threat
- 1.Qb2?
- threat
- 2.Sxh6#
- 2.Rf6#
- 2.Qf6#
- 1...Sxb2
- 2.Rf4#
- 1...Sf4
- 2.Rxf4#
- 2.Qe5#
- 1...Qg2
- 2.Sd6#
- 2.Sxh6#
- 2.Qf6#
- 1...Se5
- 2.Sxh6#
- 2.Rf4#
- 2.Qxe5#
- 1...h5
- 2.Sh6#
- 2.Rg5#
- 2.Rf6#
- 2.Qf6#
- 1...e5!
- threat
- 1.Qxc4?
- threat
- 2.Rh5#
- 2.Qg4#
- 1...Qg2
- 2.Qxe6#
- 1...Qh1
- 2.Qxe6#
- 2.Qg4#
- 1...Qf3
- 2.Qxe6#
- 1...Qa4
- 2.Rh5#
- 2.Qxe6#
- 2.e4#
- 1...Qe4
- 2.Rh5#
- 2.Qxe4#
- 1...Sf2
- 2.Rf4#
- 2.Rh5#
- 2.Qf4#
- 1...Sf4
- 2.Rxf4#
- 2.Qxf4#
- 1...Se5
- 2.Sxh6#
- 2.Rf4#
- 2.Rh5#
- 2.Qf4#
- 1...h5
- 2.Rxh5#
- 1...Qxc4!
- threat
- 1.Qb8?
- threat
- 2.Sxh6#
- 1...Sf4
- 2.Rxf4#
- 2.Qxf4#
- 2.Qe5#
- 1...Qd6
- 2.e4#
- 1...Qc7
- 2.e4#
- 1...h5
- 2.Sh6#
- 1...e5!
- threat
- 1.Kg7?
- Keys
- 1.Qd6!
- threat
- 2.Sxh6#
- 1...Qxd6
- 2.e4#
- 1...Sf4
- 2.Rxf4#
- 2.Qxf4#
- 2.Qe5#
- 1...e5
- 2.Rf6#
- 1...h5
- 2.Sh6#
- threat
- 1.Qd6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 17
- Sets
- Q(d);N_GUARD::P(A)
- Q(d);SBLOCK::R(C)
- Q(d);N_GUARD,P_PINS(F)::P(A)
- S(a);N_GUARD::R1(C)
- S(a);N_GUARD,XQ(B)::R1(C)
- S(a);N_GUARD::R1(C),XS(a)
- Tries
- Try
- K(G);P-FLIGHT
- Threat
- R1(D)
- Vars
- S(a);N_GUARD::R1(C),XS(a)
- P(e);SBLOCK::S(E),XP(f)
- Refutation
- Q(d);P_PINR(D)
- Try
- S(E);CHECK
- Vars
- K(c);P-FLIGHT::R(C)
- Refutation
- Q(d);XS(E)
- Try
- R(D);CHECK
- Refutation
- P(f);XR(D)
- Try
- Q(B);
- Threat
- DUALS(3)
- Refutation
- P(e);P_PINS(E)
- Try
- Q(B);CHECK
- Vars
- Q(d);P_SPINQ(d)::P(A)
- Q(d);XQ(B)::P(A)
- B(b);P_SPINB(b)::P(A)
- S(a);XQ(B)::R1(C)
- Refutation
- P(e);P_PINS(E),P_SPINP(e)
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- S(a);N_GUARD::R1(C),XS(a)
- Q(d);P_PINR(D)::QAR1(B)
- Refutation
- P(e);P_PINS(E)
- Try
- Q(B);
- Threat
- DUALS(3)
- Vars
- S(a);N_GUARD,XQ(B)::R1(C)
- Refutation
- P(e);P_PINS(E)
- Try
- Q(B);XB(b)
- Threat
- DUALS(2)
- Vars
- Q(d);N_GUARD,P_PINR(D)::QAB1(B),XP(e)
- Q(d);N_GUARD::QAB1(B),XP(e)
- P(f);::R(C),XP(f)
- Refutation
- Q(d);XQ(B)
- Try
- Q(B);
- Threat
- S(E),XP(f)
- Vars
- Q(d);N_GUARD::P(A)
- P(f);::S(E)
- Refutation
- P(e);P_PINS(E)
- Try
- Actual
- Q(B);
- Threat
- S(E),XP(f)
- Vars
- Q(d);N_GUARD,XQ(B)::P(A)
- P(e);P_PINS(E)::R1(D)
- P(f);::S(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).