MESON Chess Problem Database
Problem Display
PID: 272266 (1Q6/2pN4/2Pp1Kp1/b2p3b/3kp2R/B1R3N1/3n4/5B2 w - - 0 1)
Koller, Paul
Die Schwalbe, 1932
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Kxc3
- 2.Qb2#
- 1...Bxc3
- 2.Qa7#
- 1...Be2
- 2.Sxe2#
- 1...Sf3
- 2.Se2#
- 1...Sc4
- 2.Rd3#
- 1...Kxc3
- Tries
- 1.Kg5?
- threat
- 2.Qh8#
- 1...Kxc3
- 2.Qb2#
- 1...Bxc3
- 2.Qa7#
- 1...Sc4
- 2.Rd3#
- 1...Sf3+!
- threat
- 1.Ke6?
- threat
- 2.Qh8#
- 1...Kxc3
- 2.Qb2#
- 1...Bxc3
- 2.Qa7#
- 1...Sf3
- 2.Se2#
- 1...Sc4
- 2.Rd3#
- 1...Bg4+!
- threat
- 1.Kf7?
- threat
- 2.Qh8#
- 1...Kxc3
- 2.Qb2#
- 1...Bxc3
- 2.Qa7#
- 1...Sf3
- 2.Se2#
- 1...Sc4
- 2.Rd3#
- 1...g5+!
- threat
- 1.Sf5+?
- 1...Kxc3
- 2.Qb2#
- 1...gxf5!
- 1...Kxc3
- 1.Rg4?
- threat
- 2.Se2#
- 1...Kxc3
- 2.Qb2#
- 1...Bxc3
- 2.Qa7#
- 1...Bxg4!
- threat
- 1.Rxh5?
- threat
- 2.Se2#
- 1...Kxc3
- 2.Qb2#
- 1...Bxc3
- 2.Qa7#
- 1...e3!
- threat
- 1.Qb4+?
- 1...Sc4
- 2.Rd3#
- 1...Bxb4!
- 1...Sc4
- 1.Qb5?
- threat
- 2.Rd3#
- 2.Qd3#
- 1...Kxc3
- 2.Qb2#
- 1...Bxc3
- 2.Qd3#
- 1...Be2
- 2.Sxe2#
- 1...Sc4
- 2.Rd3#
- 1...Bg4!
- threat
- 1.Kg5?
- Keys
- 1.Ke7!
- threat
- 2.Qh8#
- 1...Kxc3
- 2.Qb2#
- 1...Bxc3
- 2.Qa7#
- 1...Sf3
- 2.Se2#
- 1...Sc4
- 2.Rd3#
- threat
- 1.Ke7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- K(b);N_SPINP(c),OGATEB,S_FLIGHT,XR(C)::QAB1(I)
- B(d);N_GUARD,SBLOCK,XR(C)::QAB(I)
- B(f);N_GUARD::S(D),XB(f)
- S(a);S_CUTB(f)::S(D)
- S(a);SBLOCK::R1(C)
- Tries
- Try
- K(G);S_FLIGHT
- Threat
- QAB(I)
- Vars
- K(b);N_SPINP(c),OGATEB,S_FLIGHT,XR(C)::QAB1(I)
- B(d);N_GUARD,SBLOCK,XR(C)::QAB(I)
- S(a);SBLOCK::R1(C)
- Refutation
- S(a);CHECK
- Try
- K(G);P-FLIGHT
- Threat
- QAB(I)
- Vars
- K(b);N_SPINP(c),OGATEB,S_FLIGHT,XR(C)::QAB1(I)
- B(d);N_GUARD,SBLOCK,XR(C)::QAB(I)
- S(a);S_CUTB(f)::S(D)
- S(a);SBLOCK::R1(C)
- Refutation
- B(f);CHECK,N_SPINP(c)
- Try
- K(G);P-FLIGHT
- Threat
- QAB(I)
- Vars
- K(b);N_SPINP(c),OGATEB,S_FLIGHT,XR(C)::QAB1(I)
- B(d);N_GUARD,SBLOCK,XR(C)::QAB(I)
- S(a);S_CUTB(f)::S(D)
- S(a);SBLOCK::R1(C)
- Refutation
- P(h);CHECK
- Try
- S(D);CHECK
- Vars
- K(b);N_SPINP(c),S_CUTP(h),S_FLIGHT,XR(C)::QAB1(I)
- Refutation
- P(h);XS(D)
- Try
- R(E);
- Threat
- S(D)
- Vars
- K(b);N_SPINP(c),OGATEB,S_FLIGHT,XR(C)::QAB1(I)
- B(d);N_GUARD,SBLOCK,XR(C)::QAB(I)
- Refutation
- B(f);N_SPINP(c),XR(E)
- Try
- R(E);N_PINP(c),XB(f)
- Threat
- S(D)
- Vars
- K(b);OGATEB,S_FLIGHT,XR(C)::QAB1(I)
- B(d);N_GUARD,SBLOCK,XR(C)::QAB(I)
- Refutation
- P(c);
- Try
- Q(I);CHECK
- Vars
- S(a);P_SPINS(a)::R1(C)
- Refutation
- B(d);XQ(I)
- Try
- Q(I);
- Threat
- DUALS(2)
- Vars
- K(b);N_SPINP(c),OGATEB,S_FLIGHT,XR(C)::QAB1(I)
- B(d);XR(C)::QAR1(I)
- B(f);N_GUARD::S(D),XB(f)
- S(a);::R1(C)
- Refutation
- B(f);N_SPINP(c)
- Try
- Actual
- K(G);S_FLIGHT
- Threat
- QAB(I)
- Vars
- K(b);N_SPINP(c),OGATEB,S_FLIGHT,XR(C)::QAB1(I)
- B(d);N_GUARD,SBLOCK,XR(C)::QAB(I)
- S(a);S_CUTB(f)::S(D)
- S(a);SBLOCK::R1(C)
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).