MESON Chess Problem Database
Problem Display
PID: 178711 (8/2pK1p1B/2p2Pr1/1pQ1p3/4Rp2/2nk1P2/1B6/Nn3N2 w - - 0 1)
Maleika, Gerhard
5th HM., Problem Observer Block-Threat Ty., 2009-2010
#2
9 + 10
SOLUTION
- SOUND
- Sets
- 1...Rg1
- 2.Re3#
- 1...Rg2
- 2.Re3#
- 1...Rg3
- 2.Re3#
- 1...Rg4
- 2.Re3#
- 1...Rg5
- 2.Re3#
- 1...Rxf6
- 2.Re3#
- 1...Rh6
- 2.Re3#
- 1...Rg7
- 2.Re3#
- 1...Rg8
- 2.Re3#
- 1...Sd2
- 2.Qxc3#
- 1...Sa3
- 2.Qxc3#
- 1...Sd1
- 2.Qc2#
- 1...Sa2
- 2.Qc2#
- 1...Se2
- 2.Qc2#
- 1...Sa4
- 2.Qc2#
- 1...Sxe4
- 2.Qc2#
- 1...Sd5
- 2.Qc2#
- 1...b4
- 2.Qc4#
- 1...Rg1
- Tries
- 1.Kxc6?
- 1...Sxe4
- 2.Qc2#
- 2.Qxb5#
- 1...Rg1
- 2.Re3#
- 1...Rg2
- 2.Re3#
- 1...Rg3
- 2.Re3#
- 1...Rg4
- 2.Re3#
- 1...Rg5
- 2.Re3#
- 1...Rh6
- 2.Re3#
- 1...Rg7
- 2.Re3#
- 1...Rg8
- 2.Re3#
- 1...Sd2
- 2.Qxc3#
- 1...Sa3
- 2.Qxc3#
- 1...Sd1
- 2.Qc2#
- 2.Qxb5#
- 2.Qd5#
- 1...Sa2
- 2.Qc2#
- 2.Qxb5#
- 2.Qd5#
- 1...Se2
- 2.Qc2#
- 2.Qxb5#
- 1...Sa4
- 2.Qc2#
- 2.Qxb5#
- 2.Qd5#
- 1...Sd5
- 2.Qc2#
- 2.Qxb5#
- 2.Qxd5#
- 1...b4
- 2.Qc4#
- 1...Rxf6+!
- 1...Sxe4
- 1.Kxc7?
- 1...Rxf6
- 2.Re3#
- 1...Sxe4
- 2.Qc2#
- 1...Rg1
- 2.Re3#
- 1...Rg2
- 2.Re3#
- 1...Rg3
- 2.Re3#
- 1...Rg4
- 2.Re3#
- 1...Rg5
- 2.Re3#
- 1...Rh6
- 2.Re3#
- 1...Rg7
- 2.Re3#
- 1...Rg8
- 2.Re3#
- 1...Sd2
- 2.Qxc3#
- 1...Sa3
- 2.Qxc3#
- 1...Sd1
- 2.Qd6#
- 2.Qc2#
- 1...Sa2
- 2.Qd6#
- 2.Qc2#
- 1...Se2
- 2.Qc2#
- 1...Sa4
- 2.Qd6#
- 2.Qc2#
- 1...b4
- 2.Qc4#
- 1...Sd5+!
- 1...Rxf6
- 1.Ke7?
- 1...Rxf6
- 2.Re3#
- 1...Sxe4
- 2.Qc2#
- 1...Rg1
- 2.Re3#
- 1...Rg2
- 2.Re3#
- 1...Rg3
- 2.Re3#
- 1...Rg4
- 2.Re3#
- 1...Rg5
- 2.Re3#
- 1...Rh6
- 2.Re3#
- 1...Rg7
- 2.Re3#
- 1...Rg8
- 2.Re3#
- 1...Sd2
- 2.Qxc3#
- 1...Sa3
- 2.Qxc3#
- 1...Sd1
- 2.Qc2#
- 1...Sa2
- 2.Qc2#
- 1...Se2
- 2.Qc2#
- 1...Sa4
- 2.Qc2#
- 1...b4
- 2.Qc4#
- 1...Sd5+!
- 1...Rxf6
- 1.Kc8?
- 1...Rxf6
- 2.Re3#
- 1...Sxe4
- 2.Qc2#
- 1...Rg1
- 2.Re3#
- 1...Rg2
- 2.Re3#
- 1...Rg3
- 2.Re3#
- 1...Rg4
- 2.Re3#
- 1...Rg5
- 2.Re3#
- 1...Rh6
- 2.Re3#
- 1...Rg7
- 2.Re3#
- 1...Sd2
- 2.Qxc3#
- 1...Sa3
- 2.Qxc3#
- 1...Sd1
- 2.Qc2#
- 1...Sa2
- 2.Qc2#
- 1...Se2
- 2.Qc2#
- 1...Sa4
- 2.Qc2#
- 1...Sd5
- 2.Qc2#
- 1...b4
- 2.Qc4#
- 1...Rg8+!
- 1...Rxf6
- 1.Kd8?
- 1...Rxf6
- 2.Re3#
- 1...Sxe4
- 2.Qc2#
- 1...Rg1
- 2.Re3#
- 1...Rg2
- 2.Re3#
- 1...Rg3
- 2.Re3#
- 1...Rg4
- 2.Re3#
- 1...Rg5
- 2.Re3#
- 1...Rh6
- 2.Re3#
- 1...Rg7
- 2.Re3#
- 1...Sd2
- 2.Qxc3#
- 1...Sa3
- 2.Qxc3#
- 1...Sd1
- 2.Qc2#
- 1...Sa2
- 2.Qc2#
- 1...Se2
- 2.Qc2#
- 1...Sa4
- 2.Qc2#
- 1...Sd5
- 2.Qc2#
- 1...b4
- 2.Qc4#
- 1...Rg8+!
- 1...Rxf6
- 1.Ke8?
- 1...Rxf6
- 2.Re3#
- 1...Sxe4
- 2.Qc2#
- 1...Rg1
- 2.Re3#
- 1...Rg2
- 2.Re3#
- 1...Rg3
- 2.Re3#
- 1...Rg4
- 2.Re3#
- 1...Rg5
- 2.Re3#
- 1...Rh6
- 2.Re3#
- 1...Rg7
- 2.Re3#
- 1...Sd2
- 2.Qxc3#
- 1...Sa3
- 2.Qxc3#
- 1...Sd1
- 2.Qc2#
- 1...Sa2
- 2.Qc2#
- 1...Se2
- 2.Qc2#
- 1...Sa4
- 2.Qc2#
- 1...Sd5
- 2.Qc2#
- 1...b4
- 2.Qc4#
- 1...Rg8+!
- 1...Rxf6
- 1.Bxg6?
- threat
- 2.Re3#
- 1...Sxe4
- 2.Qc2#
- 1...fxg6!
- threat
- 1.Rxe5?
- 1...Se4
- 2.Qc2#
- 1...Sd2
- 2.Qxc3#
- 1...Sa3
- 2.Qxc3#
- 1...Sd1
- 2.Qd4#
- 2.Qc2#
- 1...Sa2
- 2.Qd4#
- 2.Qc2#
- 1...Se2
- 2.Qc2#
- 1...Sa4
- 2.Qd4#
- 2.Qc2#
- 1...Sd5
- 2.Qd4#
- 2.Qc2#
- 1...b4!
- 1...Se4
- 1.Kxc6?
- Keys
- 1.Qf2!
- threat
- 2.Qc2#
- 1...Sd2
- 2.Qxd2#
- 1...Rg2
- 2.Rd4#
- 1...Sa3
- 2.Qd2#
- 1...Se2
- 2.Qxe2#
- threat
- 1.Qf2!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 4
- ADDED MATES = 0
- REMOVED MATES = 14
- Sets
- R(h);::B(I)+R(E),DCHECK
- R(h);XP(G)::B(I)+R(E),DCHECK
- S(a);N_GUARD::QAR1(F),XS(b)
- S(b);OGATE::QAB1(F)
- S(b);OGATE,XR(E)::QAB1(F)
- P(e);N_GUARD::QAB1(F)
- Tries
- Try
- K(H);P_SPINP(G),S_FLIGHT,XP(g)
- Vars
- R(h);N_PINP(G)::B(I)+R(E),DCHECK
- R(h);::B(I)+R(E),DCHECK
- S(a);N_GUARD::QAR1(F),XS(b)
- P(e);N_GUARD::QAB1(F)
- Refutation
- R(h);CHECK,XP(G)
- Try
- K(H);P-FLIGHT,XP(i)
- Vars
- R(h);XP(G)::B(I)+R(E),DCHECK
- S(b);OGATE,XR(E)::QAB1(F)
- R(h);::B(I)+R(E),DCHECK
- S(a);N_GUARD::QAR1(F),XS(b)
- S(b);OGATE::QAB1(F)
- P(e);N_GUARD::QAB1(F)
- Refutation
- S(b);CHECK
- Try
- K(H);P-FLIGHT
- Vars
- R(h);XP(G)::B(I)+R(E),DCHECK
- S(b);OGATE,XR(E)::QAB1(F)
- R(h);::B(I)+R(E),DCHECK
- S(a);N_GUARD::QAR1(F),XS(b)
- S(b);OGATE::QAB1(F)
- P(e);N_GUARD::QAB1(F)
- Refutation
- S(b);CHECK
- Try
- K(H);S_FLIGHT
- Vars
- R(h);XP(G)::B(I)+R(E),DCHECK
- S(b);OGATE,XR(E)::QAB1(F)
- R(h);::B(I)+R(E),DCHECK
- S(a);N_GUARD::QAR1(F),XS(b)
- S(b);OGATE::QAB1(F)
- P(e);N_GUARD::QAB1(F)
- Refutation
- R(h);CHECK
- Try
- K(H);P-FLIGHT
- Vars
- R(h);XP(G)::B(I)+R(E),DCHECK
- S(b);OGATE,XR(E)::QAB1(F)
- R(h);::B(I)+R(E),DCHECK
- S(a);N_GUARD::QAR1(F),XS(b)
- S(b);OGATE::QAB1(F)
- P(e);N_GUARD::QAB1(F)
- Refutation
- R(h);CHECK
- Try
- K(H);S_FLIGHT
- Vars
- R(h);XP(G)::B(I)+R(E),DCHECK
- S(b);OGATE,XR(E)::QAB1(F)
- R(h);::B(I)+R(E),DCHECK
- S(a);N_GUARD::QAR1(F),XS(b)
- S(b);OGATE::QAB1(F)
- P(e);N_GUARD::QAB1(F)
- Refutation
- R(h);CHECK
- Try
- B(I);XR(h)
- Threat
- B(I)+R(E),DCHECK
- Vars
- S(b);OGATE,P_SPINS(b),XR(E)::QAB1(F)
- Refutation
- P(j);XB(I)
- Try
- R(E);P_PINR(h),XP(f)
- Vars
- S(b);N_SPINR(h),OGATE::QAB1(F)
- S(a);N_GUARD::QAR1(F),XS(b)
- S(b);OGATE::QAB1(F)
- Refutation
- P(e);
- Try
- Actual
- Q(F);
- Threat
- QAB1(F)
- Vars
- S(a);N_GUARD::QAR1(F),XS(a)
- R(h);::B(I)+R(E),DCHECK
- S(a);N_GUARD::QAR1(F)
- S(b);N_GUARD::QAB1(F),XS(b)
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).