MESON Chess Problem Database
Problem Display
PID: 212373 (1bN1r3/7B/2Pp1Rn1/1K3b1R/2QBkr2/3p1pP1/8/8 w - - 0 1)
Groeneveld, Cornelis
The Problemist, 1986
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Re5+
- 2.Bc5#
- 1...Bh3
- 2.Bg1#
- 2.Bf2#
- 2.Bc5#
- 2.Bb6#
- 2.Ba7#
- 2.Rxf4#
- 2.Qd5#
- 1...Bg4
- 2.Bg1#
- 2.Bf2#
- 2.Bc5#
- 2.Bb6#
- 2.Ba7#
- 2.Rxf4#
- 2.Qd5#
- 1...Be6
- 2.Rxf4#
- 1...Bd7
- 2.Bg1#
- 2.Bf2#
- 2.Bc5#
- 2.Bb6#
- 2.Ba7#
- 2.Rxf4#
- 2.Qd5#
- 1...Bxc8
- 2.Bg1#
- 2.Bf2#
- 2.Bc5#
- 2.Bb6#
- 2.Ba7#
- 2.Rxf4#
- 2.Qd5#
- 1...Ba7
- 2.Sxd6#
- 1...Se7
- 2.Re6#
- 1...Re5+
- Tries
- 1.Sb6?
- threat
- 2.Qd5#
- 1...Re5+
- 2.Bc5#
- 1...Be6
- 2.Rxf4#
- 1...Se7
- 2.Re6#
- 1...d5
- 2.Qxd5#
- 1...d2!
- threat
- 1.Rhxf5?
- threat
- 2.Bg1#
- 2.Bf2#
- 2.Bc5#
- 2.Bb6#
- 2.Ba7#
- 2.Rxf4#
- 2.Qd5#
- 1...Re5+
- 2.Bc5#
- 1...f2
- 2.Rxf4#
- 2.Qd5#
- 1...d2
- 2.Bg1#
- 2.Bf2#
- 2.Bc5#
- 2.Bb6#
- 2.Ba7#
- 2.Rxf4#
- 1...Rg4
- 2.Bg1#
- 2.Bf2#
- 2.Bc5#
- 2.Bb6#
- 2.Ba7#
- 2.Qd5#
- 1...Rh4
- 2.Bg1#
- 2.Bf2#
- 2.Bc5#
- 2.Bb6#
- 2.Ba7#
- 2.Qd5#
- 1...Ba7
- 2.Sxd6#
- 2.Bc5#
- 2.Bb6#
- 2.Bxa7#
- 2.Rxf4#
- 2.Qd5#
- 1...Se5
- 2.Rxf4#
- 2.Rxe5#
- 1...Se7
- 2.Bg1#
- 2.Bf2#
- 2.Bc5#
- 2.Bb6#
- 2.Ba7#
- 2.Rxf4#
- 2.Re5#
- 2.Re6#
- 1...d5
- 2.Qxd5#
- 1...Rxf5+!
- threat
- 1.Rfxf5?
- threat
- 2.Bg1#
- 2.Bf2#
- 2.Bc5#
- 2.Bb6#
- 2.Ba7#
- 2.Rxf4#
- 2.Qd5#
- 1...Re5+
- 2.Bc5#
- 1...f2
- 2.Rxf4#
- 2.Qd5#
- 1...d2
- 2.Bg1#
- 2.Bf2#
- 2.Bc5#
- 2.Bb6#
- 2.Ba7#
- 2.Rxf4#
- 1...Rg4
- 2.Bg1#
- 2.Bf2#
- 2.Bc5#
- 2.Bb6#
- 2.Ba7#
- 2.Qd5#
- 1...Rh4
- 2.Bg1#
- 2.Bf2#
- 2.Bc5#
- 2.Bb6#
- 2.Ba7#
- 2.Qd5#
- 1...Rf8
- 2.Bg1#
- 2.Bf2#
- 2.Bc5#
- 2.Bb6#
- 2.Ba7#
- 2.Qd5#
- 1...Ba7
- 2.Sxd6#
- 2.Bc5#
- 2.Bb6#
- 2.Bxa7#
- 2.Rxf4#
- 2.Qd5#
- 1...Se5
- 2.Rxf4#
- 2.Rxe5#
- 1...Se7
- 2.Bg1#
- 2.Bf2#
- 2.Bc5#
- 2.Bb6#
- 2.Ba7#
- 2.Rxf4#
- 2.Re5#
- 1...d5
- 2.Qxd5#
- 1...Rxf5+!
- threat
- 1.Qxd3+?
- 1...Kd5
- 2.Sb6#
- 1...Kxd3!
- 1...Kd5
- 1.Sb6?
- Keys
- 1.Rxd6!
- threat
- 2.Qd5#
- 1...Re5+
- 2.Bc5#
- 1...Bxd6
- 2.Sxd6#
- 1...d2
- 2.Qc2#
- 1...Be6
- 2.Re5#
- 1...Se7
- 2.Qe6#
- threat
- 1.Rxd6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- R(i);CHECK,SBLOCK::QAR(B)+B(C)
- B(e);OGATE,P_SPINS(g)::R1(G),XR(d)
- B(h);N_GUARD::S(I),XP(f)
- S(g);N_GUARD,P_SPINB(e),S_CUTR(i)::R(G)
- Tries
- Try
- S(I);
- Threat
- QAB1(B)
- Vars
- R(i);CHECK,SBLOCK::QAR(B)+B(C)
- B(e);OGATE,P_SPINS(g)::R1(G),XR(d)
- S(g);N_GUARD,P_SPINB(e),S_CUTR(i)::R(G)
- P(f);::QAB1(B),XP(f)
- Refutation
- P(a);
- Try
- R(E);XB(e)
- Threat
- DUALS(7)
- Vars
- R(i);CHECK::QAR(B)+B(C)
- P(f);::QAB1(B),XP(f)
- Refutation
- R(d);CHECK,XR(E)
- Try
- R(G);XB(e)
- Threat
- DUALS(7)
- Vars
- R(i);CHECK::QAR(B)+B(C)
- P(f);::QAB1(B),XP(f)
- Refutation
- R(d);CHECK,XR(G)
- Try
- Q(B);CHECK,XP(a)
- Vars
- K(c);P_SPINB(e),S_FLIGHT::S(I)
- Refutation
- K(c);S_FLIGHT,XQ(B)
- Try
- Actual
- R(G);XP(f)
- Threat
- QAB1(B)
- Vars
- R(i);CHECK,SBLOCK::QAR(B)+B(C)
- B(h);XR(G)::S(I),XB(h)
- P(a);OGATEB::QAB(B)
- B(e);OGATE,P_SPINS(g)::R1(E)
- S(g);N_GUARD,P_SPINB(e),S_CUTR(i)::QAR2(B)
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