MESON Chess Problem Database

Problem Display
PID: 124544 (1b1Rb3/3q2B1/1N2N3/7r/1n2p2p/r2kP2K/5P2/n1QB4 w - - 0 1)

Sankaran, Nandakumar

Internet, 1998

1b1Rb3/3q2B1/1N2N3/7r/1n2p2p/r2kP2K/5P2/n1QB4

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Rxd4#
    • 1...Qd5
      • 2.Sc5#
    • 1...Qd6
      • 2.Sf4#
    • 1...Ra2
      • 2.Qc3#
    • 1...Rc3
      • 2.Qxc3#
    • 1...Ra4
      • 2.Qc3#
    • 1...Raa5
      • 2.Qc3#
    • 1...Ra6
      • 2.Qc3#
    • 1...Ra7
      • 2.Qc3#
    • 1...Ra8
      • 2.Qc3#
    • 1...Sb3
      • 2.Qc3#
  • Tries
    • 1.Sa4?
      • threat
        • 2.Sb2#
      • 1...Rxa4
        • 2.Qc3#
      • 1...Ra2
        • 2.Qc3#
      • 1...Be5
        • 2.Sc5#
      • 1...Rb3!
    • 1.Bc2+?
      • 1...Saxc2
        • 2.Qd1#
      • 1...Sbxc2
        • 2.Qd1#
      • 1...Ke2!
    • 1.Rxd7+?
      • 1...Rd5
        • 2.Sc5#
      • 1...Bd6
        • 2.Sf4#
      • 1...Sd5
        • 2.Sc5#
      • 1...Bxd7!
  • Keys
    • 1.Bg4!
      • threat
        • 2.Qd1#
      • 1...Qd4
        • 2.Rxd4#
      • 1...Ra2
        • 2.Qc3#
      • 1...Re5
        • 2.Sf4#
      • 1...Be5
        • 2.Sc5#
      • 1...Sb3
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(h);N_PINS(G),OGATE::R1(I),XQ(h)
    • Q(h);N_PINS(G)::S(G)
    • R(b);N_GUARD::QAR1(A)
    • R(b);N_GUARD::QAR1(A),XR(b)
    • S(a);S_CUTR(b)::QAR1(A)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • R(b);N_GUARD,XS(F)::QAR1(A)
        • R(b);N_GUARD::QAR1(A)
        • B(i);S_CUTR(g)::S(F)
      • Refutation
        • R(b);
    • Try
      • B(B);CHECK
      • Vars
        • S(a);XB(B)::QAR2(A)
        • S(d);XB(B)::QAR2(A)
      • Refutation
        • K(c);N_SPINQ(h),P_PINP(D),S_FLIGHT
    • Try
      • R(I);CHECK,N_SPINS(G),XQ(h)
      • Vars
        • R(g);P_SPINR(g)::S(G)
        • B(i);P_SPINB(i)::S(G)
        • S(d);P_SPINS(d)::S(G)
      • Refutation
        • B(j);P_PINS(G),XR(I)
  • Actual
    • B(B);N_SPINS(G)
    • Threat
      • QAR2(A)
    • Vars
      • Q(h);OGATE::R1(I),XQ(h)
      • R(b);N_GUARD::QAR1(A)
      • R(g);S_CUTB(i)::S(G)
      • B(i);S_CUTR(g)::S(G)
      • S(a);S_CUTR(b)::QAR1(A)
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