MESON Chess Problem Database
Problem Display
PID: 226968 (3R4/5p1B/1K3Ppb/P1BP2pQ/1pkN4/p6R/P7/2nN4 w - - 0 1)
van Dooren, Rene
US Problem Bulletin, 1984
#2
12 + 8
SOLUTION
- SOUND
- Sets
- 1...Sxa2
- 2.Qe2#
- 1...Se2
- 2.Qxe2#
- 1...Sb3
- 2.Qe2#
- 2.axb3#
- 1...b3
- 2.Rc3#
- 1...Sxa2
- Tries
- 1.Sc2?
- threat
- 2.Qg4#
- 1...gxh5
- 2.Sce3#
- 1...Se2
- 2.Qxe2#
- 1...Sb3
- 2.Qe2#
- 2.axb3#
- 1...Sd3
- 2.Sce3#
- 1...g4!
- threat
- 1.Se2?
- threat
- 2.Qg4#
- 1...Sxe2
- 2.Qxe2#
- 1...gxh5
- 2.Se3#
- 1...Sb3
- 2.axb3#
- 1...Sd3
- 2.Se3#
- 1...g4!
- threat
- 1.Sb3?
- threat
- 2.Sd2#
- 2.Qg4#
- 1...Sxb3
- 2.Qe2#
- 2.axb3#
- 1...gxh5
- 2.Sd2#
- 1...Se2
- 2.Sd2#
- 2.Qxe2#
- 1...Sd3
- 2.Sd2#
- 1...g4!
- threat
- 1.Sf3?
- threat
- 2.Sd2#
- 2.Se5#
- 1...g4
- 2.Se5#
- 1...Sb3
- 2.Se5#
- 1...Sd3
- 2.Sd2#
- 1...Kd3!
- threat
- 1.Sf5?
- threat
- 2.Qg4#
- 1...gxh5
- 2.Sfe3#
- 1...g4
- 2.Sd6#
- 1...Se2
- 2.Qxe2#
- 1...Sb3
- 2.Qe2#
- 2.axb3#
- 1...Sd3
- 2.Sfe3#
- 1...gxf5!
- threat
- 1.Sc6?
- threat
- 2.Se5#
- 2.Qg4#
- 1...gxh5
- 2.Se5#
- 1...g4
- 2.Se5#
- 1...Se2
- 2.Se5#
- 2.Qxe2#
- 1...Sb3
- 2.Se5#
- 2.Qe2#
- 2.axb3#
- 1...Sd3!
- threat
- 1.Rb3?
- threat
- 2.Se3#
- 1...Sxb3
- 2.Qe2#
- 1...g4!
- threat
- 1.Qe2+?
- 1...Sd3
- 2.Qxd3#
- 2.Qc2#
- 1...Sxe2!
- 1...Sd3
- 1.Qg4?
- threat
- 2.Sc2#
- 2.Se2#
- 2.Sb3#
- 2.Sb5#
- 2.Sf5#
- 2.Sc6#
- 2.Se6#
- 1...Se2
- 2.Sxe2#
- 2.Qxe2#
- 1...Sb3
- 2.Sxb3#
- 2.Qe2#
- 2.axb3#
- 1...b3
- 2.Sc2#
- 2.Se2#
- 2.Sxb3#
- 2.Sb5#
- 2.Sf5#
- 2.Sc6#
- 2.Se6#
- 2.Rc3#
- 1...Sd3!
- threat
- 1.Qxg6?
- threat
- 2.Qc2#
- 1...Sxa2
- 2.Qd3#
- 1...Se2
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...b3
- 2.Rc3#
- 1...fxg6!
- threat
- 1.Sc2?
- Keys
- 1.Sb5!
- threat
- 2.Qg4#
- 1...gxh5
- 2.Se3#
- 1...g4
- 2.Sd6#
- 1...Se2
- 2.Qxe2#
- 1...Sb3
- 2.Qe2#
- 2.axb3#
- 1...Sd3
- 2.Se3#
- threat
- 1.Sb5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 2
- Sets
- S(a);N_GUARD,XP(B)::QAB(H)
- S(a);N_GUARD::QAB(H),XS(a)
- P(c);N_GUARD::R1(C)
- Tries
- Try
- S(D);
- Threat
- QAR(H)
- Vars
- P(f);XQ(H)::S(D)
- S(a);N_GUARD::QAB(H),XS(a)
- S(a);SBLOCK::S(D)
- Refutation
- P(e);
- Try
- S(D);
- Threat
- QAR(H)
- Vars
- S(a);OGATE,XS(D)::QAB(H),XS(a)
- P(f);XQ(H)::S(A)
- S(a);OGATE::P(B),XS(a)
- S(a);SBLOCK::S(A)
- Refutation
- P(e);
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- P(f);XQ(H)::S(D)
- S(a);::S(D)
- Refutation
- P(e);
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- P(e);::S(D)
- S(a);::S(D)
- Refutation
- K(d);P_SPINP(f),S_FLIGHT
- Try
- S(D);
- Threat
- QAR(H)
- Vars
- P(f);XQ(H)::S(D)
- P(e);::S(D)
- S(a);N_GUARD::QAB(H),XS(a)
- S(a);SBLOCK::S(D)
- Refutation
- P(f);XS(D)
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- P(f);XQ(H)::S(D)
- P(e);::S(D)
- Refutation
- S(a);
- Try
- R(C);
- Threat
- S(A)
- Vars
- S(a);N_GUARD,XR(C)::QAB(H)
- Refutation
- P(e);
- Try
- Q(H);CHECK
- Refutation
- S(a);XQ(H)
- Try
- Q(H);
- Threat
- DUALS(7)
- Refutation
- S(a);
- Try
- Q(H);XP(f)
- Threat
- QAR2(H)
- Vars
- S(a);N_GUARD,XP(B)::QAB1(H)
- S(a);N_GUARD::QAB1(H)
- S(a);N_GUARD::QAB1(H),XS(a)
- P(c);N_GUARD::R1(C)
- Refutation
- P(h);XQ(H)
- Try
- Actual
- S(D);
- Threat
- QAR(H)
- Vars
- P(f);XQ(H)::S(A)
- P(e);::S(D)
- S(a);N_GUARD::QAB(H),XS(a)
- S(a);SBLOCK::S(A)
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