MESON Chess Problem Database
Problem Display
PID: 271499 (BK6/R7/8/8/pQn5/6P1/1n4R1/1q4Bk w - - 0 1)
Dutt, Sunder Chunder
The Problemist, 1956
#2
7 + 5
SOLUTION
- SOUND
- Sets
- 1...Qa2
- 2.Rh7#
- 1...Qh7
- 2.Rxh7#
- 1...Qa1
- 2.Rh7#
- 1...Qe1
- 2.Rh7#
- 1...Qf1
- 2.Rh7#
- 1...Sd3
- 2.Rh7#
- 1...Sd2
- 2.Qh4#
- 1...Sa3
- 2.Qh4#
- 1...Se3
- 2.Qh4#
- 1...Sa5
- 2.Qh4#
- 1...Se5
- 2.Qh4#
- 1...Sb6
- 2.Qh4#
- 1...Sd6
- 2.Qh4#
- 1...Qa2
- Tries
- 1.Qc5?
- threat
- 2.Rc2#
- 2.Rh2#
- 2.Qh5#
- 1...Sd3+
- 2.Rb2#
- 1...Qxg1
- 2.Qxg1#
- 1...Qe4
- 2.Rh2#
- 1...Qd3
- 2.Rh2#
- 2.Qh5#
- 1...Qc2
- 2.Rxc2#
- 2.Rh2#
- 2.Qh5#
- 1...Qf5
- 2.Rh2#
- 1...Qg6
- 2.Rh2#
- 1...Qh7
- 2.Rh2#
- 2.Rxh7#
- 1...Qd1
- 2.Rh2#
- 1...Qe1
- 2.Re2#
- 2.Rh2#
- 2.Rh7#
- 2.Qh5#
- 1...Qf1
- 2.Rh2#
- 2.Rh7#
- 2.Qh5#
- 1...Sd2
- 2.Rh2#
- 2.Qh5#
- 1...Se3
- 2.Qh5#
- 1...Sa5
- 2.Rh2#
- 2.Qh5#
- 1...Se5
- 2.Rh2#
- 1...Sb6
- 2.Rh2#
- 2.Qh5#
- 1...Sd6
- 2.Rh2#
- 2.Qh5#
- 1...Sd1+!
- threat
- 1.Qb6?
- threat
- 2.Rc2#
- 2.Rh2#
- 2.Qh6#
- 1...Qxg1
- 2.Qxg1#
- 1...Qe4
- 2.Rh2#
- 1...Qd3
- 2.Rh2#
- 2.Qh6#
- 1...Qc2
- 2.Rxc2#
- 2.Rh2#
- 2.Qh6#
- 1...Qf5
- 2.Rh2#
- 1...Qg6
- 2.Rh2#
- 1...Qh7
- 2.Rh2#
- 2.Rxh7#
- 1...Qc1
- 2.Rxb2#
- 2.Rc2#
- 2.Rd2#
- 2.Re2#
- 2.Rh2#
- 1...Qd1
- 2.Rh2#
- 1...Qe1
- 2.Re2#
- 2.Rh2#
- 2.Rh7#
- 2.Qh6#
- 1...Qf1
- 2.Rh2#
- 2.Rh7#
- 2.Qh6#
- 1...Sd1
- 2.Rc2#
- 2.Rh2#
- 1...Sd3
- 2.Ra2#
- 2.Rb2#
- 2.Rc2#
- 2.Rd2#
- 2.Re2#
- 2.Rh2#
- 2.Rh7#
- 1...Sd2
- 2.Rh2#
- 2.Qh6#
- 1...Se3
- 2.Qh6#
- 1...Sa5
- 2.Rh2#
- 2.Qh6#
- 1...Se5
- 2.Rh2#
- 2.Qh6#
- 1...Sd6
- 2.Rh2#
- 1...Sxb6!
- threat
- 1.Qc5?
- Keys
- 1.Qe1!
- threat
- 2.Rc2#
- 2.Rh2#
- 1...Sd1+
- 2.Bb6#
- 1...Sd3+
- 2.Rb2#
- 1...Qxe1
- 2.Rh7#
- 1...Qe4
- 2.Rh2#
- 1...Qd3
- 2.Rh2#
- 1...Qc2
- 2.Bf2#
- 2.Bh2#
- 2.Be3#
- 2.Bd4#
- 2.Bc5#
- 2.Bb6#
- 2.Rxc2#
- 2.Rh2#
- 1...Qf5
- 2.Bf2#
- 2.Rh2#
- 1...Qg6
- 2.Bf2#
- 2.Bh2#
- 2.Be3#
- 2.Bd4#
- 2.Bc5#
- 2.Bb6#
- 2.Rh2#
- 1...Qh7
- 2.Bf2#
- 2.Bh2#
- 2.Be3#
- 2.Bd4#
- 2.Bc5#
- 2.Bb6#
- 2.Rh2#
- 2.Rxh7#
- 1...Qd1
- 2.Rh2#
- 1...Sd2
- 2.Rh2#
- 1...Se3
- 2.Rh2#
- 1...Sa5
- 2.Rh2#
- 1...Se5
- 2.Rh2#
- 1...Sb6
- 2.Rh2#
- 1...Sd6
- 2.Rh2#
- threat
- 1.Qe1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 7
- ADDED MATES = 4
- REMOVED MATES = 5
- Sets
- Q(a);N_GUARD,SBLOCK::R(E)
- Q(a);N_GUARD::R(E),XQ(a)
- Q(a);N_GUARD::R(E)
- S(c);P_PINQ(D),S_CUTQ(a)::R(E)
- S(e);OGATE::QAR(D)
- S(e);OGATE,SBLOCK::QAR(D)
- Tries
- Try
- Q(D);
- Threat
- DUALS(3)
- Vars
- S(c);CHECK,S_CUTQ(a)::B(F)+R(B)
- Q(a);OGATE,XB(A)::QAR1(D),XQ(a)
- Q(a);::R1(B)
- Q(a);::B(F)+R(B),DCHECK
- S(e);::QAR(D)
- S(e);::B(F)+R(B),DCHECK
- Refutation
- S(c);CHECK
- Try
- Q(D);
- Threat
- DUALS(3)
- Vars
- Q(a);OGATE,XB(A)::QAR1(D),XQ(a)
- Q(a);::R1(B)
- Q(a);::B(F)+R(B),DCHECK
- S(e);::QAR(D)
- S(e);::B(F)+R(B),DCHECK
- Refutation
- S(e);XQ(D)
- Try
- Actual
- Q(D);
- Threat
- DUALS(2)
- Vars
- S(c);CHECK,S_CUTQ(a)::QAR(D)+B(A)
- S(c);CHECK,S_CUTQ(a)::B(F)+R(B)
- Q(a);N_GUARD,XQ(D)::R(E)
- Q(a);::R1(B)
- Q(a);::B(F)+R(B),DCHECK
- S(e);::B(F)+R(B),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).