MESON Chess Problem Database
Problem Display
PID: 199900 (6bn/4B1p1/2Pp2N1/6R1/3kB2Q/R1rP1K2/2r5/8 w - - 0 1)
Goethart, Gerhardus Hendrik
Op de Hoogte, 1918
#2
9 + 7
SOLUTION
- SOUND
- Sets
- 1...Rc1
- 2.Qf2#
- 1...Rf2+
- 2.Qxf2#
- 1...Rxd3+
- 2.Bxd3#
- 1...Rc5
- 2.Bd5#
- 1...Rxc6
- 2.Bxc6#
- 1...Bd5
- 2.Rxd5#
- 1...Bh7
- 2.Rd5#
- 1...Sxg6
- 2.Bxg6#
- 1...Sf7
- 2.Rd5#
- 1...d5
- 2.Bf5#
- 1...Rc1
- Tries
- 1.Bf5+?
- 1...Kd5
- 2.Bd7#
- 1...Kc5!
- 1...Kd5
- 1.Ra4+?
- 1...Bc4
- 2.Rd5#
- 1...Rc4!
- 1...Bc4
- 1.Bf5+?
- Keys
- 1.Bf8!
- threat
- 2.Bxg7#
- 1...Rf2+
- 2.Qxf2#
- 1...Rxd3+
- 2.Bxd3#
- 1...Sxg6
- 2.Bxg6#
- 1...Bd5
- 2.Rxd5#
- 1...Rc5
- 2.Bd5#
- 1...Sf7
- 2.Rd5#
- 1...d5
- 2.Bf5#
- threat
- 1.Bf8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 3
- Sets
- R(a);N_GUARD::QAB(E)
- R(a);CHECK,N_GUARD::QAB(E),XR(a)
- R(b);CHECK,OGATE,XP(B)::QAR(E)+B(D),XR(b)
- R(b);N_PINP(B),SBLOCK::QAR(E)+B(D)
- R(b);N_PINP(B),OGATE,XP(G)::QAR(E)+B(D),XR(b)
- B(f);N_GUARD,P_PINB(D)::R1(F),XB(f)
- B(f);N_GUARD::R1(F)
- S(g);OGATE,XS(H)::QAR(E)+B(D),XS(g)
- S(g);S_CUTB(f)::R1(F)
- P(d);SBLOCK::QAR(E)+B(D)
- Tries
- Try
- B(D);CHECK
- Vars
- K(c);P-FLIGHT::R(F)+B(D)
- Refutation
- K(c);P_SPINP(d),S_FLIGHT
- Try
- R(A);CHECK
- Vars
- B(f);P_SPINB(f)::R1(F)
- Refutation
- R(b);N_PINP(B),P_SPINR(b)
- Try
- Actual
- B(I);
- Threat
- B(I),XP(e)
- Vars
- R(a);CHECK,N_GUARD::QAB(E),XR(a)
- R(b);CHECK,OGATE,XP(B)::QAR(E)+B(D),XR(b)
- S(g);OGATE,XS(H)::QAR(E)+B(D),XS(g)
- B(f);N_GUARD,P_PINB(D)::R1(F),XB(f)
- R(b);N_PINP(B),SBLOCK::QAR(E)+B(D)
- S(g);S_CUTB(f)::R1(F)
- P(d);SBLOCK::QAR(E)+B(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).