MESON Chess Problem Database
Problem Display
PID: 239456 (1B1K4/6P1/4Np2/1p1k1n2/4R3/2R1n2B/6pp/4Q1b1 w - - 0 1)
Haan, Israel
Variantim, 2007
#2
8 + 8
SOLUTION
- SOUND
- Sets
- 1...Kxe4
- 2.Bxg2#
- 1...Sd1
- 2.Sf4#
- 1...Sf1
- 2.Sf4#
- 1...Sc2
- 2.Sf4#
- 1...Sg4
- 2.Sf4#
- 1...Sg3
- 2.Rd4#
- 1...Sd4
- 2.Rxd4#
- 1...Sh4
- 2.Rd4#
- 1...Sh6
- 2.Rd4#
- 1...Se7
- 2.Rd4#
- 1...Sxg7
- 2.Rd4#
- 1...Kxe4
- Tries
- 1.Sc7+?
- 1...Kd6
- 2.Re6#
- 1...Kxe4!
- 1...Kd6
- 1.Bxg2?
- threat
- 2.Sf4#
- 2.Rc5#
- 2.Rexe3#
- 2.Re5#
- 1...Sc4
- 2.Re2#
- 2.Ree3#
- 2.Rexc4#
- 2.Rd4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 2.Re5#
- 1...h1Q
- 2.Sf4#
- 2.Rc5#
- 2.Re5#
- 1...h1B
- 2.Sf4#
- 2.Rc5#
- 2.Re5#
- 1...Sd1
- 2.Sf4#
- 2.Re2#
- 2.Ree3#
- 2.Ra4#
- 2.Rb4#
- 2.Rec4#
- 2.Rd4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 2.Re5#
- 1...Sf1
- 2.Sf4#
- 2.Re2#
- 2.Ree3#
- 2.Ra4#
- 2.Rb4#
- 2.Rec4#
- 2.Rd4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 2.Re5#
- 1...Sc2
- 2.Sf4#
- 2.Re2#
- 2.Ree3#
- 2.Ra4#
- 2.Rb4#
- 2.Rec4#
- 2.Rd4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 2.Re5#
- 1...Sg4
- 2.Sf4#
- 2.Re2#
- 2.Ree3#
- 2.Ra4#
- 2.Rb4#
- 2.Rec4#
- 2.Rd4#
- 2.Rf4#
- 2.Rxg4#
- 2.Re5#
- 1...Sg3
- 2.Sf4#
- 2.Rc5#
- 2.Re5#
- 2.Qd2#
- 1...Sd4
- 2.Sf4#
- 2.Rc5#
- 2.Re5#
- 1...Sh4
- 2.Sf4#
- 2.Rc5#
- 2.Re5#
- 2.Qd2#
- 1...Sd6
- 2.Sf4#
- 2.Sc7#
- 2.Rc5#
- 2.Qd2#
- 1...Sxg2!
- threat
- 1.Bxf5?
- threat
- 2.Sf4#
- 2.Rc5#
- 2.Rd4#
- 2.Qd2#
- 1...Sxf5
- 2.Sf4#
- 1...Sd1
- 2.Sf4#
- 1...Sf1
- 2.Sf4#
- 1...Sc2
- 2.Sf4#
- 1...Sg4
- 2.Sf4#
- 1...Sc4!
- threat
- 1.Rd4+?
- 1...Kxe6
- 2.g8Q#
- 2.g8B#
- 1...Sxd4!
- 1...Kxe6
- 1.Qd2+?
- 1...Sd4
- 2.Rxd4#
- 2.Qxd4#
- 1...Kxe4!
- 1...Sd4
- 1.Qd1+?
- 1...Kxe4
- 2.Sc5#
- 1...Sd4
- 2.Rxd4#
- 2.Qxd4#
- 1...Sxd1!
- 1...Kxe4
- 1.Qxe3?
- threat
- 2.Sf4#
- 2.Rc5#
- 1...Sxe3
- 2.Rd4#
- 1...Bxe3!
- threat
- 1.g8S?
- threat
- 2.Sxf6#
- 1...Kxe4
- 2.Bxg2#
- 1...Sg4
- 2.Sf4#
- 1...Sc4!
- threat
- 1.Sc7+?
- Keys
- 1.Rb4!
- threat
- 2.Sf4#
- 1...Kxe6
- 2.g8Q#
- 2.g8B#
- 1...Sc4
- 2.Bxg2#
- 1...Sd4
- 2.Rxd4#
- 1...Sd6
- 2.Rc5#
- threat
- 1.Rb4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 10
- Sets
- K(f);OGATEB,P_SPINS(d),S_FLIGHT,XR(D)::B(C),XP(b)
- S(d);::S(E)
- S(g);N_GUARD::R1(D)
- S(g);N_GUARD::R1(D),XS(g)
- S(g);N_GUARD,XP(F)::R1(D)
- Tries
- Try
- S(E);CHECK
- Vars
- K(f);P-FLIGHT::R1(D)
- Refutation
- K(f);P_SPINS(d),S_FLIGHT,XR(D)
- Try
- B(C);XP(b)
- Threat
- DUALS(4)
- Refutation
- S(d);XB(C)
- Try
- B(C);XS(g)
- Threat
- DUALS(4)
- Vars
- S(d);XB(C)::S(E)
- S(d);::S(E)
- Refutation
- S(d);
- Try
- R(D);CHECK
- Vars
- K(f);P_SPINS(d),S_FLIGHT,XS(E)::P=Q
- Refutation
- S(g);XR(D)
- Try
- Q(A);CHECK
- Refutation
- K(f);S_FLIGHT,XR(D)
- Try
- Q(A);CHECK
- Vars
- K(f);S_FLIGHT,XR(D)::S(E)
- Refutation
- S(d);XQ(A)
- Try
- Q(A);XS(d)
- Threat
- DUALS(2)
- Vars
- S(g);N_GUARD,XQ(A)::R1(D)
- Refutation
- B(a);XQ(A)
- Try
- P(F);
- Threat
- S(F),XP(h)
- Vars
- K(f);OGATEB,P_SPINS(d),S_FLIGHT,XR(D)::B(C),XP(b)
- S(d);::S(E)
- Refutation
- S(d);
- Try
- Actual
- R(D);
- Threat
- S(E)
- Vars
- K(f);P_SPINS(d),S_FLIGHT,XS(E)::P=Q
- S(d);N_GUARD::B(C),XP(b)
- S(g);N_GUARD::R1(D),XS(g)
- S(g);::R1(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).