MESON Chess Problem Database
Problem Display
PID: 275874 (8/4p1Qn/3R1r2/8/6br/2N1k2p/2P1pR1N/2n1K3 w - - 0 1)
Daams, J
Probleemblad, 1953
#2
7 + 9
SOLUTION
- SOUND
- Sets
- 1...Rh5
- 2.Sxg4#
- 1...Rhh6
- 2.Sxg4#
- 1...Rxf2
- 2.Qd4#
- 2.Qe5#
- 1...Rf3
- 2.Qd4#
- 2.Qe5#
- 1...Rf5
- 2.Qd4#
- 1...Rxd6
- 2.Qe5#
- 1...Re6
- 2.Qd4#
- 1...Rg6
- 2.Qd4#
- 2.Qe5#
- 1...Rfh6
- 2.Qd4#
- 2.Qe5#
- 1...Rf7
- 2.Qd4#
- 2.Qe5#
- 1...Rf8
- 2.Qd4#
- 2.Qe5#
- 1...Bf5
- 2.Rf3#
- 2.Qg3#
- 1...Sa2
- 2.Rd3#
- 1...Sb3
- 2.Rd3#
- 1...Sd3+
- 2.Rxd3#
- 1...exd6
- 2.Qa7#
- 1...e5
- 2.Qa7#
- 1...e6
- 2.Qa7#
- 1...Rh5
- Tries
- 1.Rf3+?
- 1...Rxf3
- 2.Qd4#
- 2.Qe5#
- 1...Bxf3!
- 1...Rxf3
- 1.Rfxf6?
- 1...Sd3+
- 2.Rxd3#
- 1...Sxf6
- 2.Qg5#
- 1...exd6
- 2.Qa7#
- 1...Bf5
- 2.Qg3#
- 1...Rh5
- 2.Sxg4#
- 1...Rh6
- 2.Sxg4#
- 1...Bf3
- 2.Rxf3#
- 2.Qg1#
- 1...Bh5
- 2.Qg1#
- 1...Be6
- 2.Rf3#
- 2.Qg1#
- 2.Qg3#
- 1...Bd7
- 2.Rf3#
- 2.Qg1#
- 2.Qg3#
- 1...Bc8
- 2.Rf3#
- 2.Qg1#
- 2.Qg3#
- 1...Sa2
- 2.Rd3#
- 1...Sb3
- 2.Rd3#
- 1...Sg5
- 2.Qxg5#
- 1...Sf8
- 2.Qg5#
- 1...e5
- 2.Qa7#
- 1...e6
- 2.Qa7#
- 1...exf6!
- 1...Sd3+
- 1.Qg5+?
- 1...Rf4
- 2.Qxf4#
- 1...Sxg5!
- 1...Rf4
- 1.Qxe7+?
- 1...Re6
- 2.Qa7#
- 1...Be6!
- 1...Re6
- 1.Rf3+?
- Keys
- 1.Rf5!
- 1...Sd3+
- 2.Rxd3#
- 1...Rxf5
- 2.Qd4#
- 1...Rxd6
- 2.Qe5#
- 1...Bxf5
- 2.Qg3#
- 1...exd6
- 2.Qa7#
- 1...Rh5
- 2.Sxg4#
- 1...Rhh6
- 2.Sxg4#
- 1...Re6
- 2.Rxe6#
- 2.Qd4#
- 1...Rg6
- 2.Qd4#
- 2.Qe5#
- 1...Rfh6
- 2.Qd4#
- 2.Qe5#
- 1...Rf7
- 2.Re6#
- 2.Qd4#
- 2.Qe5#
- 1...Rf8
- 2.Re6#
- 2.Qd4#
- 2.Qe5#
- 2.Qxe7#
- 1...Bf3
- 2.Qg1#
- 1...Bh5
- 2.Qg1#
- 1...Sa2
- 2.Rd3#
- 1...Sb3
- 2.Rd3#
- 1...Sg5
- 2.Qxg5#
- 1...Sf8
- 2.Qg5#
- 1...e5
- 2.Qa7#
- 1...e6
- 2.Qa7#
- 1...Sd3+
- 1.Rf5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 1
- Sets
- R(f);N_GUARD::S(D),XB(e)
- R(g);OGATE::QAB1(G)
- R(g);OGATE,XR(F)::QAR2(G)
- S(a);N_GUARD::R1(F)
- S(a);CHECK,N_GUARD::R1(F),XS(a)
- P(h);OGATE,XR(F)::QAB(G)
- P(h);OGATE::QAB(G)
- Tries
- Try
- R(C);CHECK
- Refutation
- B(e);XR(C)
- Try
- R(C);XR(g)
- Vars
- S(a);CHECK,N_GUARD::R1(F),XS(a)
- S(i);N_GUARD,XR(C)::QAB(G)
- P(h);OGATE,XR(F)::QAB(G)
- B(e);OGATE::QAR2(G)
- R(f);N_GUARD::S(D),XB(e)
- B(e);OGATE::QAB(G)
- S(a);N_GUARD::R1(F)
- S(i);N_GUARD::QAB(G),XS(i)
- S(i);N_GUARD::QAB(G)
- P(h);OGATE::QAB(G)
- Refutation
- P(h);XR(C)
- Try
- Q(G);CHECK
- Vars
- R(g);N_GUARD,P_SPINR(g)::QAB1(G),XR(g)
- Refutation
- S(i);XQ(G)
- Try
- Q(G);CHECK,XP(h)
- Vars
- R(g);P_SPINR(g)::QAB(G)
- Refutation
- B(e);P_SPINB(e)
- Try
- Actual
- R(C);
- Vars
- S(a);CHECK,N_GUARD::R1(F),XS(a)
- R(g);OGATE,XR(C)::QAB1(G)
- R(g);OGATE,XR(F)::QAR2(G)
- B(e);OGATE,XR(C)::QAR2(G)
- P(h);OGATE,XR(F)::QAB(G)
- R(f);N_GUARD::S(D),XB(e)
- B(e);OGATE::QAB(G)
- S(a);N_GUARD::R1(F)
- S(i);N_GUARD::QAB(G),XS(i)
- S(i);N_GUARD::QAB(G)
- P(h);OGATE::QAB(G)
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).