MESON Chess Problem Database

Problem Display
PID: 245430 (qbr5/pr3p2/Qp3R2/p2k1p2/2R1Np2/2B5/bK2P1p1/7B w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Mat 64, 2001

qbr5/pr3p2/Qp3R2/p2k1p2/2R1Np2/2B5/bK2P1p1/7B

#2

8 + 13

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rbc7
      • 2.Rd6#
    • 1...Rcc7
      • 2.Rd6#
    • 1...Rd8
      • 2.Qb5#
    • 1...Re8
      • 2.Qb5#
    • 1...Rf8
      • 2.Qb5#
    • 1...Rg8
      • 2.Qb5#
    • 1...Rh8
      • 2.Qb5#
    • 1...Bd6
      • 2.Rxd6#
    • 1...Bc7
      • 2.Qb5#
  • Tries
    • 1.Rc5+?
      • 1...Kxe4
        • 2.Qd3#
      • 1...Rxc5
        • 2.Qd3#
      • 1...bxc5+!
    • 1.Rxf5+?
      • 1...Be5
        • 2.Rxe5#
      • 1...Ke6!
    • 1.Rfc6?
      • threat
        • 2.Sf6#
        • 2.Qb5#
      • 1...Bxc4
        • 2.Qxc4#
      • 1...fxe4
        • 2.Qb5#
      • 1...Bd6
        • 2.Rxd6#
      • 1...g1Q
        • 2.Sf6#
      • 1...g1B
        • 2.Sf6#
      • 1...Be5
        • 2.Qb5#
      • 1...b5
        • 2.Sf6#
      • 1...f6
        • 2.Sxf6#
        • 2.Qb5#
      • 1...Rxc6!
  • Keys
    • 1.Rc7!
      • threat
        • 2.Qd3#
      • 1...Kxe4
        • 2.Qd3#
      • 1...fxe4
        • 2.Qb5#
      • 1...g1Q
        • 2.Rd6#
      • 1...g1B
        • 2.Rd6#
      • 1...Bb1
        • 2.Qc4#
      • 1...Bc4
        • 2.Qxc4#
      • 1...b5
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 9
  • Sets
    • R(i);S_CUTB(l)::R1(H)
    • R(m);S_CUTB(l)::R1(H)
    • R(m);N_GUARD::QAR2(G)
    • B(l);N_GUARD::R1(H),XB(l)
    • B(l);S_CUTR(m)::QAR2(G)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(e);P_SPINP(b),S_FLIGHT,XS(F)::QAB1(G)
        • R(m);XR(E)::QAR2(G)
      • Refutation
        • P(g);CHECK,XR(E)
    • Try
      • R(H);CHECK,XP(f)
      • Vars
        • B(l);N_GUARD,P_PINB(D),P_SPINB(l)::R1(H),XB(l)
      • Refutation
        • K(e);P_SPINP(g),S_FLIGHT
    • Try
      • R(H);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);OGATE,XR(E)::QAB1(G),XB(a)
        • P(f);XS(F)::QAR2(G)
        • B(l);N_GUARD::R1(H),XB(l)
        • P(b);::B(A)+S(F),DCHECK
        • B(l);P_PINB(D)::QAR2(G)
        • P(g);::S(F)
      • Refutation
        • R(m);XR(H)
  • Actual
    • R(E);
    • Threat
      • QAR2(G)
    • Vars
      • K(e);P_SPINP(b),S_FLIGHT,XS(F)::QAB1(G)
      • P(f);SBLOCK,XS(F)::QAR2(G)
      • P(b);::R1(H)
      • B(a);N_GUARD::QAB1(G)
      • B(a);N_GUARD::QAB1(G),XB(a)
      • P(g);OGATE::QAB1(G)
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