MESON Chess Problem Database

Problem Display
PID: 250140 (6b1/Q1p5/2P2N2/p3P1RB/4Pk1P/K1B4p/3prr1q/8 w - - 0 1)

Grigoriev, K

5th Prize, Trud (Moscow), 1927

6b1/Q1p5/2P2N2/p3P1RB/4Pk1P/K1B4p/3prr1q/8

#2

10 + 9

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qg3
      • 2.Rf5#
    • 1...Rf3
      • 2.Rg4#
  • Tries
    • 1.Sd5+?
      • 1...Kxe4
        • 2.Qd4#
      • 1...Bxd5!
    • 1.Bxd2+?
      • 1...Re3+
        • 2.Bxe3#
        • 2.Qxe3#
      • 1...Rxd2!
    • 1.Bxe2?
      • threat
        • 2.Bxd2#
        • 2.Rg4#
      • 1...d1Q
        • 2.Rg4#
      • 1...d1S
        • 2.Rg4#
      • 1...d1B
        • 2.Bd2#
        • 2.Rg4#
      • 1...d1R
        • 2.Rg4#
      • 1...Qg1
        • 2.Bxd2#
      • 1...Qg3
        • 2.Rf5#
      • 1...Qg2
        • 2.Bxd2#
      • 1...Rg2
        • 2.Bxd2#
      • 1...Rf3
        • 2.Rg4#
      • 1...Be6
        • 2.Bxd2#
      • 1...Rxe2!
  • Keys
    • 1.e6!
      • threat
        • 2.Be5#
      • 1...Rxe4
        • 2.Sd5#
      • 1...Qg3
        • 2.Rf5#
      • 1...Re3
        • 2.Qxc7#
      • 1...Rf3
        • 2.Rg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(d);P_PINB(B),SBLOCK::R1(F)
    • R(c);P_PINB(B),SBLOCK::R1(F)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • K(f);P-FLIGHT,S_CUTB(i),XP(C)::QAR1(J)
      • Refutation
        • B(i);XS(I)
    • Try
      • B(B);CHECK,XP(a)
      • Refutation
        • R(b);XB(B)
    • Try
      • B(G);XR(b)
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::R1(F)
        • Q(d);::B(B),XP(a)
        • Q(d);P_PINB(B),SBLOCK::R1(F)
        • R(c);::B(B),XP(a)
        • R(c);P_PINB(B)::R1(F)
        • B(i);::B(B),XP(a)
      • Refutation
        • R(c);XB(G)
  • Actual
    • P(E);
    • Threat
      • B(B)
    • Vars
      • R(b);SBLOCK,XP(C)::S(I)
      • Q(d);P_PINB(B),SBLOCK::R1(F)
      • R(b);P_PINB(B),SBLOCK::QAB(J),XP(h)
      • R(c);P_PINB(B),SBLOCK::R1(F)
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