MESON Chess Problem Database
Problem Display
PID: 31092 (4n3/4B3/1N2p3/2P1k3/R7/6n1/KN1qPR2/QB6 w - - 0 1)
Hartong, Jan
De Problemist, 1927
#2
10 + 5
SOLUTION
- SOUND
- Sets
- 1...Qc1
- 2.Sd3#
- 2.S2c4#
- 1...Qe1
- 2.Sd3#
- 2.S2c4#
- 1...Qc3
- 2.Sd3#
- 1...Qe3
- 2.Sd3#
- 2.S2c4#
- 1...Qb4
- 2.S2c4#
- 1...Qf4
- 2.S2c4#
- 1...Qa5
- 2.Sd3#
- 2.S2c4#
- 1...Qg5
- 2.Sd1#
- 2.Sd3#
- 2.S2c4#
- 1...Qh6
- 2.Sd1#
- 2.Sd3#
- 2.S2c4#
- 1...Qd1
- 2.Sxd1#
- 2.Sd3#
- 2.S2c4#
- 1...Qxb2+
- 2.Qxb2#
- 1...Qd3
- 2.Sxd3#
- 1...Qd4
- 2.S2c4#
- 1...Qd5+
- 2.S2c4#
- 1...Qd6
- 2.Sd3#
- 2.S2c4#
- 1...Qd7
- 2.Sd3#
- 2.S2c4#
- 1...Qd8
- 2.Sd3#
- 2.S2c4#
- 1...Sf1
- 2.Re4#
- 1...Sh1
- 2.Re4#
- 1...Sxe2
- 2.Re4#
- 1...Se4
- 2.Rxe4#
- 1...Sf5
- 2.Re4#
- 1...Sh5
- 2.Re4#
- 1...Sd6
- 2.Bf6#
- 1...Sf6
- 2.Bxf6#
- 1...Sc7
- 2.Bf6#
- 1...Sg7
- 2.Bf6#
- 1...Qc1
- Tries
- 1.Bc2?
- threat
- 2.Sd3#
- 2.S2c4#
- 1...Qd5+
- 2.S2c4#
- 1...Qb4
- 2.S2c4#
- 1...Qc3
- 2.Sd3#
- 1...Qf4
- 2.S2c4#
- 1...Qd3
- 2.Sxd3#
- 1...Qd4
- 2.S2c4#
- 1...Qxc2!
- threat
- 1.Bd6+?
- 1...Qxd6
- 2.Sd3#
- 2.S2c4#
- 1...Sxd6!
- 1...Qxd6
- 1.Rf5+?
- 1...Sxf5
- 2.Re4#
- 1...exf5!
- 1...Sxf5
- 1.Bc2?
- Keys
- 1.Bh4!
- 1...Qxb2+
- 2.Qxb2#
- 1...Qd5+
- 2.S2c4#
- 1...Qxe2
- 2.Bxg3#
- 1...Sxe2
- 2.Re4#
- 1...Qb4
- 2.S2c4#
- 1...Qc2
- 2.Bxg3#
- 1...Qc1
- 2.Sd3#
- 2.S2c4#
- 1...Qe1
- 2.Sd3#
- 2.S2c4#
- 2.Bxg3#
- 1...Qc3
- 2.Sd3#
- 1...Qe3
- 2.Sd3#
- 2.S2c4#
- 1...Qf4
- 2.S2c4#
- 1...Qa5
- 2.Sd3#
- 2.S2c4#
- 2.Bxg3#
- 1...Qg5
- 2.Sd1#
- 2.Sd3#
- 2.S2c4#
- 1...Qh6
- 2.Sd1#
- 2.Sd3#
- 2.S2c4#
- 1...Qd1
- 2.Sxd1#
- 2.Sd3#
- 2.S2c4#
- 2.Bxg3#
- 1...Qd3
- 2.Sxd3#
- 1...Qd4
- 2.S2c4#
- 1...Qd6
- 2.Sd3#
- 2.S2c4#
- 2.Bxg3#
- 1...Qd7
- 2.Sd3#
- 2.S2c4#
- 2.Bxg3#
- 1...Qd8
- 2.Sd3#
- 2.S2c4#
- 2.Bxg3#
- 1...Sf1
- 2.Re4#
- 1...Sh1
- 2.Re4#
- 1...Se4
- 2.Rxe4#
- 1...Sf5
- 2.Re4#
- 1...Sh5
- 2.Re4#
- 1...Sd6
- 2.Bf6#
- 1...Sf6
- 2.Bxf6#
- 1...Sc7
- 2.Bf6#
- 1...Sg7
- 2.Bf6#
- 1...Qxb2+
- 1.Bh4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- Q(a);N_PINS(D)::S(D)
- Q(a);N_PINS(D)::QAB(A)+S(D),DCHECK
- Q(a);CHECK,OGATE,P_SPINQ(a),XS(D)::QAB(A),XQ(a)
- Q(a);N_PINS(D)::QAB(A)+S(D),DCHECK,XQ(a)
- Q(a);CHECK,N_PINS(D)::QAB(A)+S(D),DCHECK
- S(b);N_GUARD::R1(G)
- S(b);N_GUARD,XP(E)::R1(G)
- S(b);N_GUARD::R1(G),XS(b)
- S(e);N_GUARD::B(J)
- S(e);N_GUARD::B(J),XS(e)
- Tries
- Try
- B(B);N_SPINS(D)
- Threat
- DUALS(2)
- Vars
- Q(a);CHECK::QAB(A)+S(D),DCHECK
- Q(a);::QAB(A)+S(D),DCHECK
- Q(a);::S(D)
- Q(a);::QAB(A)+S(D),DCHECK,XQ(a)
- Refutation
- Q(a);P_PINS(D),XB(B)
- Try
- B(J);CHECK
- Refutation
- S(e);XB(J)
- Try
- R(F);CHECK
- Vars
- S(b);SBLOCK,XR(F)::R1(G)
- Refutation
- P(d);XR(F)
- Try
- Actual
- B(J);
- Vars
- Q(a);CHECK,OGATE,P_SPINQ(a),XS(D)::QAB(A),XQ(a)
- Q(a);CHECK,N_PINS(D)::QAB(A)+S(D),DCHECK
- Q(a);N_GUARD,XP(E)::B(J),XS(b)
- S(b);N_GUARD,XP(E)::R1(G)
- Q(a);N_PINS(D)::QAB(A)+S(D),DCHECK
- Q(a);N_GUARD::B(J),XS(b)
- Q(a);N_PINS(D)::S(D)
- Q(a);N_PINS(D)::QAB(A)+S(D),DCHECK,XQ(a)
- S(b);N_GUARD::R1(G)
- S(b);N_GUARD::R1(G),XS(b)
- S(e);N_GUARD::B(J)
- S(e);N_GUARD::B(J),XS(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).