MESON Chess Problem Database
Problem Display
PID: 266972 (3R4/1B1q4/n1r5/B1k5/P1NN4/bK6/2Q5/3R4 w - - 0 1)
Subrahmanyam, Swaminatha
The Problemist, 1955
#2
9 + 5
SOLUTION
- SOUND
- Sets
- 1...Kd5
- 2.Qf5#
- 1...Qh3+
- 2.Se3#
- 1...Qg4
- 2.Sb2#
- 2.Sd2#
- 2.Sxa3#
- 2.Se3#
- 2.Se5#
- 2.Sb6#
- 1...Qf5
- 2.Qxf5#
- 1...Qc8
- 2.Sb2#
- 2.Sd2#
- 2.Sxa3#
- 2.Se3#
- 2.Se5#
- 2.Sb6#
- 1...Qe8
- 2.Sb2#
- 2.Sd2#
- 2.Sxa3#
- 2.Se3#
- 2.Se5#
- 2.Sb6#
- 1...Qd6
- 2.Se3#
- 2.Sb6#
- 1...Qxb7+
- 2.Sb6#
- 1...Qc7
- 2.Sb2#
- 2.Sd2#
- 2.Sxa3#
- 2.Se3#
- 2.Se5#
- 2.Sb6#
- 1...Qe7
- 2.Sb2#
- 2.Sd2#
- 2.Sxa3#
- 2.Se3#
- 2.Se5#
- 2.Sb6#
- 1...Qg7
- 2.Sb2#
- 2.Sd2#
- 2.Sxa3#
- 2.Se3#
- 2.Se5#
- 2.Sb6#
- 1...Rb6+
- 2.Bxb6#
- 1...Rd6
- 2.Sb2#
- 2.Sxa3#
- 2.Se3#
- 2.Se5#
- 2.Sb6#
- 1...Rc7
- 2.Bb6#
- 1...Rc8
- 2.Bb6#
- 1...Kd5
- Tries
- 1.Sxc6?
- threat
- 2.Sb2#
- 2.Sxa3#
- 2.Se3#
- 2.S4e5#
- 2.Sb6#
- 2.Sd6#
- 2.Bb6#
- 1...Qh3+
- 2.Se3#
- 1...Qxb7+
- 2.Sb6#
- 1...Qxc6
- 2.Sb2#
- 2.Sd2#
- 2.Sxa3#
- 2.Se3#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 2.Qf2#
- 1...Qxd1
- 2.Bb6#
- 1...Qxd8
- 2.Sb2#
- 2.Sxa3#
- 2.Se3#
- 2.S4e5#
- 2.Sb6#
- 2.Sd6#
- 1...Qg4
- 2.Bb6#
- 2.R1d5#
- 2.R8d5#
- 1...Qf5
- 2.Bb6#
- 2.Qxf5#
- 1...Qe6
- 2.Bb6#
- 1...Qd2
- 2.Sxd2#
- 2.Bb6#
- 1...Qd4
- 2.Bb6#
- 1...Qd5
- 2.Bb6#
- 2.R1xd5#
- 2.R8xd5#
- 1...Qd6
- 2.Sb2#
- 2.Sxa3#
- 2.Se3#
- 2.S4e5#
- 2.Sb6#
- 2.Sxd6#
- 2.Bb6#
- 1...Qc7
- 2.Sb2#
- 2.Sd2#
- 2.Sxa3#
- 2.Se3#
- 2.S4e5#
- 2.Sb6#
- 2.Sd6#
- 2.R1d5#
- 2.R8d5#
- 2.Qf2#
- 1...Qf7
- 2.Bb6#
- 1...Qg7
- 2.S4e5#
- 2.Bb6#
- 2.R1d5#
- 2.R8d5#
- 1...Qh7
- 2.Bb6#
- 2.R1d5#
- 2.R8d5#
- 2.Qf2#
- 1...Bc1
- 2.Sb2#
- 2.Sa3#
- 2.Se3#
- 2.S4e5#
- 2.Sb6#
- 2.Sd6#
- 2.Bb6#
- 1...Bb2
- 2.Sxb2#
- 2.Bb6#
- 1...Bb4
- 2.Bb6#
- 1...Sb4
- 2.Bb6#
- 1...Qd3+!
- threat
- 1.Se6+?
- 1...Rxe6
- 2.Sb2#
- 2.Sxa3#
- 2.Se3#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 1...Qxe6!
- 1...Rxe6
- 1.Bb6+?
- 1...Kd5
- 2.Bxc6#
- 2.Qf5#
- 2.Qg2#
- 1...Rxb6+!
- 1...Kd5
- 1.Rxd7?
- threat
- 2.Sb2#
- 2.Sd2#
- 2.Sxa3#
- 2.Se3#
- 2.Se5#
- 2.Sb6#
- 2.Qf5#
- 1...Rb6+
- 2.Sxb6#
- 2.Bxb6#
- 1...Rd6
- 2.Sb2#
- 2.Sxa3#
- 2.Se3#
- 2.Se5#
- 2.Sb6#
- 2.Sxd6#
- 1...Re6
- 2.Sb2#
- 2.Sd2#
- 2.Sxa3#
- 2.Se3#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 2.Sxe6#
- 2.Rd5#
- 1...Rf6
- 2.Sb2#
- 2.Sd2#
- 2.Sxa3#
- 2.Se3#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 2.Rd5#
- 1...Bc1
- 2.Sb2#
- 2.Sd2#
- 2.Sa3#
- 2.Se3#
- 2.Se5#
- 2.Sb6#
- 2.Qf5#
- 1...Bb2
- 2.Sxb2#
- 2.Qf5#
- 1...Bb4
- 2.Qf5#
- 1...Sc7
- 2.Sb2#
- 2.Sd2#
- 2.Sxa3#
- 2.Se3#
- 2.Se5#
- 2.Sb6#
- 1...Sb4!
- threat
- 1.Qf5+?
- 1...Qd5
- 2.Rxd5#
- 2.Qxd5#
- 1...Qxf5!
- 1...Qd5
- 1.Sxc6?
- Keys
- 1.Qf2!
- threat
- 2.Se6#
- 1...Qh3+
- 2.Sf3#
- 1...Qxb7+
- 2.Sb5#
- 1...Rb6+
- 2.Bxb6#
- 1...Kd5
- 2.Qf5#
- 1...Qxd4
- 2.Qxd4#
- 1...Qe6
- 2.Sxe6#
- 1...Re6
- 2.Sxe6#
- threat
- 1.Qf2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 3
- REMOVED MATES = 3
- Sets
- K(b);P-FLIGHT,P_SPINQ(e),P_SPINR(d)::QAR2(B)
- Q(e);CHECK::QAR(B)+S(E)
- Q(e);N_GUARD::QAR(B),XQ(e)
- Q(e);CHECK,XB(H)::QAR(B)+S(E)
- R(d);CHECK,N_GUARD::B(G),XR(d)
- R(d);N_GUARD::B(G)
- Tries
- Try
- S(F);XR(d)
- Threat
- DUALS(7)
- Vars
- Q(e);CHECK::QAR(B)+S(E)
- Q(e);CHECK,XB(H)::QAR(B)+S(E)
- Q(e);P_PINQ(B),XR(A)::B(G)
- Q(e);P_PINS(E)::B(G)
- Q(e);::B(G)
- B(a);::B(G)
- S(c);::B(G)
- Refutation
- Q(e);CHECK
- Try
- S(F);CHECK
- Refutation
- Q(e);P_PINS(E),XS(F)
- Try
- B(G);CHECK
- Refutation
- R(d);CHECK,XB(G)
- Try
- R(I);XQ(e)
- Threat
- DUALS(7)
- Vars
- B(a);::QAR(B)
- Refutation
- S(c);
- Try
- Q(B);CHECK
- Refutation
- Q(e);XQ(B)
- Try
- Actual
- Q(B);
- Threat
- QAB(B)+S(F),DCHECK
- Vars
- Q(e);CHECK,N_GUARD::QAB(B)+S(F)
- Q(e);CHECK,N_GUARD,XB(H)::QAB(B)+S(F)
- R(d);CHECK,N_GUARD::B(G),XR(d)
- K(b);P-FLIGHT,P_SPINQ(e),P_SPINR(d)::QAR2(B)
- Q(e);OGATE,P_SPINQ(e),XS(F)::QAB1(B),XQ(e)
- Q(e);P_PINS(E)::QAB(B)+S(F),DCHECK,XQ(e)
- R(d);::QAB(B)+S(F),DCHECK,XR(d)
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).