MESON Chess Problem Database
Problem Display
PID: 46972 (4n3/3p4/R5Np/pP1k4/rqRNpp2/1B1p3n/5B1K/3Q1b2 w - - 0 1)
Narayanan, Chithathuz Gopatan Sathya
The Problemist, 1989
#2
9 + 12
| 4640 | Chess Wizardry: The New ABC of Chess Problems | 1996 |
SOLUTION
- SOUND
- Sets
- 1...Sg1
- 2.Qh5#
- 1...Sxf2
- 2.Qh5#
- 1...e3
- 2.Qf3#
- 1...Sg1
- Tries
- 1.Sc2?
- threat
- 2.Rxb4#
- 2.Rc5#
- 1...Qxb3
- 2.Rc5#
- 1...Qxb5
- 2.Rc5#
- 1...Sxf2
- 2.Qh5#
- 1...Qd6
- 2.Rxa4#
- 2.Rb4#
- 2.Rc5#
- 1...Sd6
- 2.Rc5#
- 1...Qe1
- 2.Rxa4#
- 2.Rb4#
- 2.Rc5#
- 1...Qd2
- 2.Rxa4#
- 2.Rb4#
- 2.Rc5#
- 1...Qa3
- 2.Rc5#
- 1...Qc3
- 2.Rc5#
- 1...Qc5
- 2.Rd4#
- 2.Rxc5#
- 1...Qe7
- 2.Rxa4#
- 2.Rb4#
- 2.Rc5#
- 1...Qf8
- 2.Rxa4#
- 2.Rb4#
- 2.Rc5#
- 1...Ra3
- 2.Rc5#
- 1...d2
- 2.Rc5#
- 1...e3
- 2.Qf3#
- 1...Qxc4!
- threat
- 1.Sf3?
- threat
- 2.Rxb4#
- 2.Rc5#
- 1...Qxb3
- 2.Rc5#
- 1...Qxc4
- 2.Se7#
- 1...Qxb5
- 2.Se7#
- 2.Rc5#
- 1...Sxf2
- 2.Sxf4#
- 1...exf3
- 2.Rxb4#
- 2.Qxf3#
- 1...Qd6
- 2.Rxa4#
- 2.Rb4#
- 2.Rc5#
- 1...Sd6
- 2.Rc5#
- 1...Qe1
- 2.Se7#
- 2.Rxa4#
- 2.Rb4#
- 2.Rc5#
- 1...Qd2
- 2.Se7#
- 2.Rxa4#
- 2.Rb4#
- 2.Rc5#
- 1...Qa3
- 2.Rc5#
- 1...Qc3
- 2.Se7#
- 2.Rc5#
- 1...Qc5
- 2.Rd4#
- 2.Rxc5#
- 1...Qe7
- 2.Sxe7#
- 2.Rxa4#
- 2.Rb4#
- 2.Rc5#
- 1...Qf8
- 2.Rxa4#
- 2.Rb4#
- 2.Rc5#
- 1...Ra3
- 2.Rc5#
- 1...d2
- 2.Rc5#
- 1...e3!
- threat
- 1.Sf5?
- threat
- 2.Rxb4#
- 2.Rc5#
- 1...Qxb3
- 2.Rc5#
- 1...Qxc4
- 2.Sfe7#
- 1...Qxb5
- 2.Sfe7#
- 2.Rc5#
- 1...Qd6
- 2.Rxa4#
- 2.Rb4#
- 2.Rc5#
- 1...Sd6
- 2.Rc5#
- 1...Qe1
- 2.Sfe7#
- 2.Rxa4#
- 2.Rb4#
- 2.Rc5#
- 1...Qd2
- 2.Sfe7#
- 2.Rxa4#
- 2.Rb4#
- 2.Rc5#
- 1...Qa3
- 2.Rc5#
- 1...Qc3
- 2.Sfe7#
- 2.Rc5#
- 1...Qc5
- 2.Rd4#
- 2.Rxc5#
- 1...Qe7
- 2.Sfxe7#
- 2.Rxa4#
- 2.Rb4#
- 2.Rc5#
- 1...Qf8
- 2.Rxa4#
- 2.Rb4#
- 2.Rc5#
- 1...Ra3
- 2.Rc5#
- 1...d2
- 2.Rc5#
- 1...e3
- 2.Qf3#
- 1...Sxf2!
- threat
- 1.Se6?
- threat
- 2.Rxb4#
- 2.Rd4#
- 2.Rc5#
- 1...Qxb3
- 2.Rc5#
- 1...Qxb5
- 2.Rd4#
- 2.Rc5#
- 1...dxe6
- 2.Rxb4#
- 2.Rc5#
- 1...Qd6
- 2.Rxa4#
- 2.Rb4#
- 2.Rd4#
- 2.Rc5#
- 1...Sd6
- 2.Sc7#
- 2.Rd4#
- 2.Rc5#
- 1...Qe1
- 2.Rxa4#
- 2.Rb4#
- 2.Rd4#
- 2.Rc5#
- 1...Qd2
- 2.Rxa4#
- 2.Rb4#
- 2.Rd4#
- 2.Rc5#
- 1...Qa3
- 2.Rd4#
- 2.Rc5#
- 1...Qc3
- 2.Rd4#
- 2.Rc5#
- 1...Qc5
- 2.Rd4#
- 2.Rxc5#
- 1...Qe7
- 2.Rxa4#
- 2.Rb4#
- 2.Rd4#
- 2.Rc5#
- 1...Qf8
- 2.Rxa4#
- 2.Rb4#
- 2.Rd4#
- 2.Rc5#
- 1...Ra3
- 2.Rd4#
- 2.Rc5#
- 1...d2
- 2.Rd4#
- 2.Rc5#
- 1...e3
- 2.Rxb4#
- 2.Rd4#
- 2.Qf3#
- 1...Qxc4!
- threat
- 1.Sc2?
- Keys
- 1.Se2!
- threat
- 2.Rxb4#
- 2.Rc5#
- 1...Qxb3
- 2.Rc5#
- 1...Qxc4
- 2.Sc3#
- 1...Qxb5
- 2.Sc3#
- 2.Rc5#
- 1...Sxf2
- 2.Sexf4#
- 1...Qd6
- 2.Rxa4#
- 2.Rb4#
- 2.Rc5#
- 1...Sd6
- 2.Rc5#
- 1...Qe1
- 2.Rxa4#
- 2.Rb4#
- 2.Rc5#
- 1...Qd2
- 2.Rxa4#
- 2.Rb4#
- 2.Rc5#
- 1...Qa3
- 2.Sc3#
- 2.Rc5#
- 1...Qc3
- 2.Sxc3#
- 2.Rc5#
- 1...Qc5
- 2.Sc3#
- 2.Rd4#
- 2.Rxc5#
- 1...Qe7
- 2.Sc3#
- 2.Rxa4#
- 2.Rb4#
- 2.Rc5#
- 1...Qf8
- 2.Sc3#
- 2.Rxa4#
- 2.Rb4#
- 2.Rc5#
- 1...Ra3
- 2.Rc5#
- 1...e3
- 2.Qxd3#
- threat
- 1.Se2!
This is a version
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 4
- REMOVED MATES = 1
- Sets
- S(c);N_GUARD::QAR(A)
- S(c);N_GUARD,XB(B)::QAR(A)
- P(f);OGATEB::QAB(A)
- Tries
- Try
- S(F);P_PINP(b)
- Threat
- DUALS(2)
- Vars
- Q(e);XB(D)::R1(E)
- Q(e);XP(G)::B(D)+R(E),DCHECK
- S(c);N_GUARD,XB(B)::QAR(A)
- S(l);::B(D)+R(E),DCHECK
- Q(e);::B(D)+R(E),DCHECK
- R(d);::B(D)+R(E),DCHECK
- P(b);::B(D)+R(E),DCHECK
- P(f);OGATEB::QAB(A)
- Refutation
- Q(e);P_SPINQ(e),XR(E)
- Try
- S(F);P_PINP(b)
- Threat
- DUALS(2)
- Vars
- Q(e);XB(D)::R1(E)
- Q(e);N_GUARD,P_SPINQ(e),XR(E)::S(I)
- S(c);N_GUARD,XB(B)::S(I),XP(g)
- S(l);::B(D)+R(E),DCHECK
- Q(e);::B(D)+R(E),DCHECK
- R(d);::B(D)+R(E),DCHECK
- P(b);::B(D)+R(E),DCHECK
- Refutation
- P(f);
- Try
- S(F);P_PINP(b)
- Threat
- DUALS(2)
- Vars
- Q(e);XB(D)::R1(E)
- Q(e);N_GUARD,P_SPINQ(e),XR(E)::S(F)
- S(l);::B(D)+R(E),DCHECK
- Q(e);::B(D)+R(E),DCHECK
- R(d);::B(D)+R(E),DCHECK
- P(b);::B(D)+R(E),DCHECK
- P(f);OGATEB::QAB(A)
- Refutation
- S(c);XB(B)
- Try
- S(F);P_PINP(b)
- Threat
- DUALS(3)
- Vars
- Q(e);XB(D)::R1(E)
- Refutation
- Q(e);P_SPINQ(e),XR(E)
- Try
- Actual
- S(F);P_PINP(b)
- Threat
- DUALS(2)
- Vars
- Q(e);XB(D)::R1(E)
- Q(e);N_GUARD,P_SPINQ(e),XR(E)::S(F)
- S(c);N_GUARD,XB(B)::S(F),XP(g)
- S(l);::B(D)+R(E),DCHECK
- R(d);::B(D)+R(E),DCHECK
- P(f);N_GUARD::QAR2(A),XP(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).