MESON Chess Problem Database
Problem Display
PID: 141539 (2R5/3Nrr2/p7/5p1b/Q1Pk1Nn1/1p6/1P2R3/qBB1K3 w - - 0 1)
den Toom, Cornelis
Probleemblad, 1977
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...Qxb2
- 2.Bxb2#
- 1...Qxb1
- 2.c5#
- 1...Rxe2+
- 2.Sxe2#
- 1...Re6
- 2.Sxe6#
- 1...Rxd7
- 2.Se6#
- 1...Se3
- 2.Rd2#
- 1...Se5
- 2.Be3#
- 1...Qxb2
- Tries
- 1.Be3+?
- 1...Sxe3
- 2.Rd2#
- 1...Rxe3!
- 1...Sxe3
- 1.Re4+?
- 1...fxe4
- 2.Se2#
- 1...Rxe4+!
- 1...fxe4
- 1.Rxe7?
- threat
- 2.Se2#
- 2.Se6#
- 1...Qxb2
- 2.Bxb2#
- 1...Qxb1
- 2.c5#
- 1...Rf6
- 2.Se2#
- 1...Sf2
- 2.Se6#
- 2.Be3#
- 1...Sh2
- 2.Se6#
- 2.Be3#
- 1...Se3
- 2.Se6#
- 2.Bxe3#
- 1...Se5
- 2.Se6#
- 1...Sf6
- 2.Se6#
- 2.Be3#
- 1...Sh6
- 2.Se6#
- 2.Be3#
- 1...Rxe7+!
- threat
- 1.Qb4?
- threat
- 2.Qd2#
- 2.Qc3#
- 2.Qc5#
- 2.Qd6#
- 2.Qb6#
- 2.c5#
- 1...Rxe2+
- 2.Sxe2#
- 1...Qxb2
- 2.Bxb2#
- 2.c5#
- 1...Qxb1
- 2.Qc3#
- 2.Qc5#
- 2.Qd6#
- 2.Qb6#
- 2.c5#
- 1...Rxd7
- 2.Se6#
- 2.Qd2#
- 2.Qc3#
- 2.Qc5#
- 2.Qb6#
- 2.c5#
- 1...Qa3
- 2.Qd2#
- 2.Qc3#
- 1...Qa4
- 2.Qd2#
- 2.Qc3#
- 2.Qc5#
- 2.Qd6#
- 2.Qb6#
- 1...Re3
- 2.Qc5#
- 2.Qd6#
- 2.Qb6#
- 2.c5#
- 1...Re5
- 2.Qd2#
- 2.Qc3#
- 2.c5#
- 1...Re6
- 2.Sxe6#
- 2.Qd2#
- 2.Qc3#
- 2.Qc5#
- 2.c5#
- 1...Rf6
- 2.Qd2#
- 2.Qc3#
- 2.Qc5#
- 2.c5#
- 1...Sf2
- 2.Qc3#
- 2.Qc5#
- 2.Qd6#
- 2.Qb6#
- 2.c5#
- 1...Se3
- 2.Rd2#
- 2.Qd2#
- 2.Qc3#
- 2.Qc5#
- 2.Qb6#
- 1...Se5
- 2.Be3#
- 2.Qc3#
- 2.Qc5#
- 2.Qd6#
- 2.Qb6#
- 1...Sf6
- 2.Qd2#
- 2.Qc3#
- 2.Qc5#
- 2.Qb6#
- 2.c5#
- 1...a5
- 2.Qd2#
- 2.Qc3#
- 2.Qc5#
- 2.Qd6#
- 2.Qb6#
- 1...Qa5!
- threat
- 1.Qa5?
- threat
- 2.Qd2#
- 2.Qc3#
- 2.Qb6#
- 2.Qc5#
- 2.Qd5#
- 1...Rxe2+
- 2.Sxe2#
- 1...Qxb2
- 2.Bxb2#
- 1...Qxb1
- 2.Qc3#
- 2.Qb6#
- 2.Qc5#
- 2.Qd5#
- 1...Rxd7
- 2.Se6#
- 2.Qd2#
- 2.Qc3#
- 2.Qb6#
- 2.Qc5#
- 1...Qa3
- 2.Qd2#
- 2.Qc3#
- 2.Qd5#
- 1...Re3
- 2.Qb6#
- 2.Qc5#
- 2.Qd5#
- 1...Re5
- 2.Qd2#
- 2.Qc3#
- 1...Re6
- 2.Sxe6#
- 2.Qd2#
- 2.Qc3#
- 2.Qc5#
- 2.Qd5#
- 1...Rf6
- 2.Qd2#
- 2.Qc3#
- 2.Qc5#
- 2.Qd5#
- 1...Sf2
- 2.Qc3#
- 2.Qb6#
- 2.Qc5#
- 2.Qd5#
- 1...Se3
- 2.Rd2#
- 2.Qd2#
- 2.Qc3#
- 2.Qb6#
- 2.Qc5#
- 1...Se5
- 2.Be3#
- 2.Qc3#
- 2.Qb6#
- 2.Qc5#
- 2.Qd5#
- 1...Sf6
- 2.Qd2#
- 2.Qc3#
- 2.Qb6#
- 2.Qc5#
- 1...Qxa5+!
- threat
- 1.Be3+?
- Keys
- 1.Re6!
- threat
- 2.Se2#
- 1...Rxe6+
- 2.Sxe6#
- 1...Qxb2
- 2.Bxb2#
- 1...Qxb1
- 2.c5#
- 1...Sf2
- 2.Be3#
- 1...Sh2
- 2.Be3#
- 1...Se3
- 2.Bxe3#
- 1...Se5
- 2.Rd6#
- 1...Sf6
- 2.Be3#
- 1...Sh6
- 2.Be3#
- threat
- 1.Re6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 4
- REMOVED MATES = 2
- Sets
- Q(a);OGATE,XP(D)::B(B),XQ(a)
- Q(a);N_GUARD,P_PINB(B),XB(A)::QAR(F)+P(G)
- R(h);CHECK,XR(E)::S(H),XR(h)
- R(h);N_GUARD::S(H),XR(h)
- R(h);N_GUARD,N_PINR(E),XS(I)::S(H)
- S(d);N_PINR(E),SBLOCK::R(E)
- S(d);N_GUARD,N_PINR(E),S_CUTR(h)::B(B)
- Tries
- Try
- B(B);CHECK,N_SPINR(E),P_SPINB(A)
- Vars
- S(d);SBLOCK,XB(B)::R(E)
- Refutation
- R(h);P_PINR(E),XB(B)
- Try
- R(E);CHECK
- Vars
- P(e);XR(E)::S(H)
- Refutation
- R(h);CHECK,XR(E)
- Try
- R(E);N_SPINR(E),XR(h)
- Threat
- DUALS(2)
- Vars
- Q(a);OGATE,XP(D)::B(B),XQ(a)
- Q(a);N_GUARD,P_PINB(B),XB(A)::QAR(F)+P(G)
- R(i);::S(H)
- S(d);::S(H)
- Refutation
- R(i);CHECK,XR(E)
- Try
- Q(F);
- Threat
- DUALS(6)
- Vars
- R(h);CHECK,XR(E)::S(H),XR(h)
- Refutation
- Q(a);P_PINQ(F)
- Try
- Q(F);
- Threat
- DUALS(5)
- Vars
- R(h);CHECK,XR(E)::S(H),XR(h)
- Q(a);OGATE,XP(D)::B(B),XQ(a)
- Refutation
- Q(a);CHECK,XQ(F)
- Try
- Actual
- R(E);
- Threat
- S(H)
- Vars
- R(h);CHECK,XR(E)::S(H),XR(h)
- Q(a);OGATE,XP(D)::B(B),XQ(a)
- Q(a);N_GUARD,P_PINB(B),XB(A)::QAR(F)+P(G)
- S(d);N_GUARD::B(B)
- S(d);N_GUARD,N_PINR(E)::B(B),XS(d)
- S(d);N_PINR(E)::R(E)
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).